Thursday

December 8, 2016
Number of results: 6,156

**Math**

I'm learning series and sequences (grade 11). Please check that my steps show I understand what I'm doing/the concept and my answer as well: 5. The consecutive terms of an arithmetic sequences are 3.6, y, 8.2. Find the value of y. This seems to be a sequence question but I ...

*January 8, 2013 by Crystal*

**Series and sequences**

Three numbers a,b, and c form a geometric series so that a+b+c=35 and abc=1000. Find the values of a,b,c.

*January 3, 2013 by Shaira*

**arithemetic progression too hard help plz**

find the nth term of the series 1,3,6,11,31,48.... Hence duduce a formula for calculating the sum of the series plz help me show working

*September 17, 2016 by dam*

**Math**

In sequences and series::: I don't understand the difference between (for arthemtic series) the equations 1) sn= t/2(ti-tn) 2) (n* n-1)/2 where would you use each one and how are they different?

*December 12, 2006 by mary11*

**SeQuEnCeS and SeRiEs: HELP PLZ!**

The first three terms of the sequence -8,x,y,72... form an arithmetic sequence, while the second, third and fourth terms form a geometric sequence. Determine x and y.

*January 4, 2013 by kazz*

**Biology**

When making comparison of sequences where some are whole genome sequences while others are partial genome sequences, or a specific glycoprotein sequence, How is it that we are able to make comparisons from these sequences if they all have different lengths?

*April 21, 2013 by Cristian*

**Algebra**

Using the index of a series as the domain and the value of the series as the range, is a series a function? Include the following in your answer: Which one of the basic functions (linear, quadratic, rational, or exponential) is related to the arithmetic series? Which one of ...

*October 29, 2006 by V*

**Algebra 2: Sequences and Series**

I have this question and I don't understand what it's asking for. It says evaluate, is it asking for the missing term or what? The sequence 21, 23, 25, 27, 29, ..., 41 has 11 terms. Evaluate the related series. * 320 * 341 * 300 * 166 Very confused, any insight on how to solve...

*April 3, 2010 by Skye*

**Math**

Using the index of a series as the domain and the value of the series as the range, is a series a function? Include the following in your answer: Which one of the basic functions (linear, quadratic, rational, or exponential) is related to the arithmetic series? Which one of ...

*October 28, 2006 by Vianna*

**Sequences and Series **

Find the 21st term, 6,5,1,2,6,5,1,2

*April 21, 2016 by Wawen*

**Series and Sequences**

Find the next three terms in the pattern 20,40,60,11,31,51,......

*April 21, 2016 by Wawen*

**Sequences and Series **

Find the next three terms in the pattern, 25,5,30,6,35,7,....

*April 21, 2016 by Wawen*

**Plz do help..GEOMETRIC SEQUENCES**

a company gives its employees a 4% raise at the beginning of every year.This year Jordan earns 32000. Could you plz tell me how I get the year at which he earns,$40000?

*April 28, 2016 by Munna*

**series**

find the nth term awmd partail sum of the harmonic series below 1/3+1/8+1/15+1/12+..........show working plz

*March 19, 2016 by help*

**math(sequences)**

0.5,1.5,4.5,13.5,... what is the next three terms??? plz help

*September 9, 2008 by n'kyla*

**maths plz help**

give the expansion sin^8@ as a series of cos@ plz help me show working where @ means theta

*September 21, 2016 by sam*

**Functions 11: Series and Sequences**

4m + 1, m + 1 and 10 - m are the first three terms of a geometric sequence. Find t4.

*January 2, 2013 by lg*

**math**

what method i need to use in solving arithmetic and geometric sequences and series?

*February 16, 2013 by luis*

**miss reiny correct-done**

find the nth term of the series 1,3,6,11,19,31,48.... Hence duduce a formula for calculating the sum of the series plz help me show working

*September 17, 2016 by dam*

**Sequences and Series**

PreCal. What is the difference between the equations (n(n+1))/2, and n/2(ti+tn)?? Under what conditions would you use them? Thanks much!!!

*January 10, 2007 by Cait*

**math**

what formula use in solving or finding for the 9th term of a number in arithmetic series and sequences?

*February 16, 2013 by luis*

**Sequences and Series**

use the iterative rule to find the eighth term in the sequence an = 25 − 3n. 176 49<------ My answer 8 1

*October 1, 2015 by Sara*

**biology**

Below the human hemoglobin sequence are the first thirty amino acid sequences of several other species’ hemoglobins. Inspect the sequences and answer the following questions: Human) h l t p e e k s a v t a l w g k v n v d e v g g e a l g r l A) ml t a e e k a a v t a f w g k...

*April 1, 2012 by Kim*

**math 12 - sequences and series**

Given the expression Sn = n^2 + 2n for the sume of the first n terms of a series, determine a) An expression, in simplified form, for Sn-1 in tmers of n b) an expression, in simplified form, for the nth terms, tn in terms of n

*March 1, 2010 by CL*

**MATH!!!! SEQUENCES!!!**

Find out a formula for the Nth term of each of the following sequences. (i)4 7 10 13 16 (ii)1 3 5 7 9 (iii)20 17 14 11 8 (iv)1 4 9 16 25 (v)2 8 18 32 50

*December 14, 2011 by Howler*

**math sequences and series**

how do i solve if t1=1/2 and tn=tn-1+1/n(n+1), determine an explicit formula for the general term. (hint: it is neither arithmetic nor geometric. write out the first few terms)

*May 31, 2010 by alicia*

**Math**

So, this "kiddo" needs some help plz! You are having a discussion about sequences with your classmate. She insists that the sequence is 2, 3, 5, 8, and 12 must be either arithmetic or geometric. Is she correct. Explain. HELP I DO NOT UNDERSTAND THIS!!!!! D;

*March 20, 2016 by No one special*

**LIVING ENVIRONMENT**

the ability to grow in size is a characteristic of living organism .Although an icicle may grow in size over time,it is considered nonliving because there is 1)an incerase in matter ,but no increase in the number of icicle. 2)an interaction between the icicle and the ...

*February 12, 2013 by tania sharmin*

**science (check plz)**

1)When evolution was first proposed, which of the following was used as evidence to support the idea? A)observations of nature B)laboratory experiments C)extensive fossil collections*** D)genetic sequences

*June 12, 2014 by Me*

**Ms. Sue PLZ HELP!!!(science)**

When evolution was first proposed, which of the following was used as evidence to support the idea? A. observations of nature *** B. laboratory experiments C. extensive fossil collections D. genetic sequences

*May 18, 2015 by Anonymous*

**math **

identify the value of x that makes each pair of the ratios equivalent x:4 and 45:20 A.8 B.9 C.10 plz plz plz plz help me!!!!!!!! PLZ!!!!!

*November 2, 2015 by pankakes*

**Math**

Evaluate 1/3 + square root(3)/12 + 1/16 + square root (3)/64. I hope this makes sense. Right now we're learning sequences and series and I'm really confused on this question.

*December 15, 2014 by Jeff*

**geometric sequences**

given the geometric sequences:9 90/17, 900/289 find an explicit formula for an, where the first term is a1=9 an= a10=

*April 25, 2016 by Rosie*

**Biology Help Please!**

)Describe the importance of chromatin remodeling process to transcription. Select the four correct answers. a) These alterations can be used to activate transcription of a gene by hiding its enhancer sequences. b) These alterations can be used to activate transcription of a ...

*April 24, 2016 by Kimberly*

**I NEED HELP!!:(!!!! HELP ME PLZ!!**

I GOT A FEW QUESTIONS SO what is a cell part that has the funcion of a gel-like material inside cells... and what releases energy into the cell.?? plz plz plz plz HELP!!!

*October 20, 2009 by i really need help!!*

**Maths: Sequences need help**

The nth term of a sequences of v1,v2,v3 is given by Vn=6 2^n (1):show that for all value of n>1 Vn1=2(Vn-3)?? (2): obtain and simplify the sum of the first n term of the sequence??

*September 26, 2015 by Collins*

**math plz plz plz plz help plz .....thank you**

mark bought a notebook for $1.45 and some pencils that cost $0.42 each if the total cost was 6.91,how many pencils did he buy A.12 B.13 C.14 D.15 is 14 the answer plz help thank you

*November 23, 2015 by random rainbow*

**Biology**

Here are parts of the DNA base sequences for 7 organisms: Organism 1: GCCTAGGCATTACGCTACGTCGCATTATAC Organism 2: GCTAAGGCACTACGCTACGTCGCTTAATAG Organism 3: GCTAAGCACTACGCTACGTCGCTTAATAGC Organism 4: GCTAAGGCACTACGCTACGTCGCATTATAC Organism 5: GCCAAGGCACTACGCTACGTCGCATTATAC ...

*October 28, 2016 by Maria*

**sequences and Series **

If 5 times the 5th term is equal to the 6 times the 6th term of an arithmetic sequence then its 11th term is.......

*April 21, 2016 by Wawen*

**simpson**

help me integrate these sin(x^2)dx plz the answer is in infinte series

*October 1, 2016 by sir damon*

**Biology**

Humans and Gorillas are very similar in terms of their genetic sequences; in a sample of each of their DNA sequences, only ONE difference was found. MY QUESTION: What genetic mechanism could cause this base sequence change? Thanks!

*June 4, 2008 by Millwright*

**Math**

Consider the following series: 1,2,3,4,5,10,20,40....which starts as an arithmetic series? ...but after the first five terms becomes a geometric series. Prove that any positive integer can be written as a sum of distinct numbers from the series. I know how to do the base case

*May 17, 2016 by MO*

**social studies? i think idk**

what new ideas came from the automobile? plz help plz plz plz ASAP

*December 5, 2015 by Geena*

**Excel Help**

3) __________ are used to compare sets of data in one chart. Time series Multiple data series Relative series Comparison series Is multiple data series

*July 12, 2009 by Bryan*

**Algebra 2 Honors**

Right now in my class i am learning about sequences and series and im currtently suck on this problem. "A certain sequence is defined recursively by the t1=1 , t2=2, t2n=2t2n-2, t2n+1=3t2n-1. Find the first eight terms of the sequence." thanks for your help.

*May 12, 2008 by Stephanie*

**Math ....urgent help**

i just don't get this elimination method ..... plz help me plz.....teach me how to keep the x and y in a parallel line. and which number to multiply.....plz help -5x-4y=-11 10x=-6-y help me plz......

*January 7, 2009 by vero*

**SS plz help me plzzzzzzz**

What are the two major forces that reshape earth? Describe how itworks. plz plz plz help me there are no answer choices hope u can still help

*November 18, 2015 by #AriannaGirl :)*

**sequences and series**

how do i solve the sum of the first two terms of an arithmetic sequence is 16. the sum of the second and third term is 28. determine the first three terms, algebraically

*May 31, 2010 by alicia*

**math sequences and series**

how do i solve the sum of the first two terms of an arithmetic sequence is 16. the sum of the second and third term is 28. determine the first three terms, algebraically

*May 31, 2010 by alicia*

**Maths Please Help**

Let A=a1,a2,…,ak and B=b1,b2,…,bj be sequences of positive integers such that a1≥a2≥⋯ak≥1, b1≥b2≥⋯bj≥1, ∑i=1k ai≤6, and ∑j i=1 bi≤6. For how many ordered pairs of sequences (A,B) satisfying the above ...

*May 22, 2013 by Mathslover*

**SS PLZ HELP ME ASAP**

What are the two major forces that shape and reshape earth? Describe how each one works. plz plz plz help me there are no answer choices hope u can still help

*November 18, 2015 by #AriannaGirl :)*

**Calculus**

Consider the infinite series of the form: (+/-)3(+/-)1(+/-)(1/3)(+/-)(1/9)(+/-)(1/27)(+/-)...(+/-)(1/3^n)(+/-)... (A) Find x and y from: x(</=)(+/-)3(+/-)1(+/-)(1/3)(+/-)...(</=)y. (B) Can you choose the signs to make the series diverge? (C) Can you choose the signs to ...

*April 21, 2010 by Megan*

**calculus**

Consider the infinite series of the form: (+/-)3(+/-)1(+/-)(1/3)(+/-)(1/9)(+/-)(1/27)(+/-)...(+/-)(1/3^n)(+/-)... (A) Find x and y from: x(</=)(+/-)3(+/-)1(+/-)(1/3)(+/-)...(</=)y. (B) Can you choose the signs to make the series diverge? (C) Can you choose the signs to ...

*April 22, 2010 by Megan*

**calculus**

Consider the infinite series of the form: (+/-)3(+/-)1(+/-)(1/3)(+/-)(1/9)(+/-)(1/27)(+/-)...(+/-)(1/3^n)(+/-)... (A) Find x and y from: x(</=)(+/-)3(+/-)1(+/-)(1/3)(+/-)...(</=)y. (B) Can you choose the signs to make the series diverge? (C) Can you choose the signs to ...

*April 22, 2010 by Megan*

**Plz do help..GEOMETRIC SEQUENCES**

a company gives its employees a 4% raise at the beginning of every year.This year Jordan earns 32000. Write a rule to find Jordan's salary after n years. please help me with this one...

*April 28, 2016 by Munna*

**IB Math Studies**

I saw a similar post earlier. I also want to see who has better memory out of men and women. I was thinking of testing ability to remember a series of simple objects or number sequences. Could I use chi-squared, HOW could I use it? Any other sophisticated processes? thanks.

*September 18, 2012 by Louis*

**biology**

a boy inherits genes for tallness,but his growth is limited as a result of poor nitrition. this is an example of 1)an inherited disorder. 2)environmental influence on gene expression . 3)expression of a hidden trait 4)a characterstic controlled by more than one pair of genes. ...

*February 8, 2013 by tania sharmin*

**Algebra 2**

I need steps on how to complete this please i am so confused and lost. :( Consider the infinite geometric series x e n=1 -4(1/3) n-1. In this image, the lower limit of the summation notation is "n=1". a. Write the first four terms of the series. b. Does the series diverge of ...

*March 10, 2015 by Sammy*

**English (plz read)**

I'm creating is HUGE book series. Can you check to see if the blurb is good. The series follows the journey of a teenage girl who is determined to have best year ever in the 8th grade and to have the best 4 year experience in high school. Please make sure if they any grammar ...

*July 22, 2012 by Laruen *

**math**

How many n-digit decimal sequences (using digits 0-9) are there with k 1s? Decimal sequences meaning you can have as many 0s in front of a number. For example: 000001234557891111 would be consider valid. So how do i come up with an equation? See my response to Sana's question ...

*October 15, 2006 by Aisha*

**English plz help quick**

what literary term is this and why. I think the world is a series of broken dams and floods.

*May 21, 2015 by leo*

**maths pppllllz hellllp me too hard**

determine a series if solution of the equation y"(x)+x.y'(x)+y(x)=0 show me step plz

*September 25, 2016 by philip*

**Plz help!!! algebra **

convert the decimal 0.6 to a fraction by writing it as a infinite series. I really have no idea how to do this can anyone please help me?

*April 14, 2012 by ashley*

**plz plz help me belive me have tried**

cosx+cosy=a and sinx+siny=b show that sin2x+sin2y=2ab(1-(2/(a^2+b^2)) plz plz show step

*November 2, 2016 by maths*

**Chemistry**

Hydrogen exhibits several series of line spectra in different spectral regions. For example the Lyman series (nf = 1 in Balmer-Rydberg equation) occurs in the ultraviolet region while the Balmer (nf = 2) series occurs in the visible range and the Paschen (nf = 3), Brackett (...

*November 10, 2013 by Andy*

**Calculus**

a) Find the Taylor series associated to f(x) = x^-2 at a = 1. Be sure to show the general term of the series. b) Find the radius of convergence of the series. c)Use Lagrange's Remainder Theorem to prove that for x in the interval of convergence with x > 1; the power series ...

*August 8, 2011 by laura*

**Calculus**

Determine the following about the series. Indicate the test that was used and justify your answer. Sigma (lower index n = 1; upper index infinity) [sin((2n-1)pi/2)]/n A. The series diverges B. The series converges conditionally. C. The series converges absolutely. D. It cannot...

*February 11, 2013 by Jenny*

**Integral Calculus**

We can use this power series to approximate the constant pi: arctan(x) = (summation from n = 1 to infinity) of ((-1)^n * x^(2n+1))/(2n+1) a) First evaluate arctan(1) without the given series. (I know this is pi/4) b) Use your answer from part (a) and the power series to find a...

*December 1, 2016 by Matt*

**Maths**

Consider all 3-term geometric sequences with first term 1 and with common ratio the square of an integer between 1 and 1000. How many of these 1000 geometric sequences have the property that the sum of the 3 terms is prime?

*April 29, 2013 by ianian*

**algebra**

Consider all 3-term geometric sequences with first term 1 and with common ratio the square of an integer between 1 and 1000. How many of these 1000 geometric sequences have the property that the sum of the 3 terms is prime?

*April 29, 2013 by deli*

**math**

for this infinite series (-1)^n/n^2 if i use alternating series test to show that sequence does of a^n does not go to 0, then does this mean that this series is diverging

*July 27, 2010 by eng*

**Arithmetic Series - - Reiny**

Consider the series defined by Sn = 3n-1 Find the first four terms of the series. How exactly do I do this?

*September 12, 2011 by Anonymous*

**math**

hi if i wanna find the Maclaurin series from another existing series by integrating that series , do i need to include the constant of integration ?? Thanks

*May 16, 2010 by William*

**Calculus**

By recognizing each series below as a Taylor series evaluated at a particular value of x, find the sum of each convergent series. A) 1+5 + (5^2)/(2!)+(5^3)/(3!)+(5^4)/(4!)+...+ (5^k)/(k!)+...= B) 1-(2^2)/(2!)+(2^4)/(4!)-(2^6)/(6!)+...+((-1)^(k)2^(2k))/((2k)!) +...=

*June 18, 2013 by Cole*

**Math**

Consider all 3-term geometric sequences with first term 1 and with common ratio the square of an integer between 1 and 1000 (inclusive). How many of these 1000 geometric sequences have the property that the sum of the 3 terms is prime?

*May 1, 2013 by Maths lover Please Help...*

**math**

the last two tems in a geometric series are 1080 and 6480 and the sum ofthe series is 7775 what is the first term in the series

*December 18, 2011 by Heather*

**math**

1. Examine the first four terms in each of the following number sequences: *2, 7, 12, 17 my formula x+5 *7, 21, 63, 189, 567 my formula x(2)+x *1000, 850, 700, 550 my formula x-150 * –10, –6, –2, 2 my formula x+4 For each sequence, what would be the 20th and 100th term? ...

*June 17, 2016 by cindy*

**Geometry i need help urgently plz plz plz **

The lenght of a line segement is of 10units and the co-ordinate of one end point are (2,-3) if the abscissa of the other end is 10 find the ordinate of the other end?? Working plz plz

*October 18, 2015 by Collins*

**sequences and Series **

Wilma has 64 cherries. She gives half the amount of cherries ib her bag to each friend she visits. Rose's house was the fifth house, Wilma visited. How many cherries did Rose get?

*April 21, 2016 by Wawen*

**chemistry**

Hydrogen exhibits several series of line spectra in different spectral regions. For example the Lyman series (nf = 1 in Balmer-Rydberg equation) occurs in the ultraviolet region while the Balmer (nf = 2) series occurs in the visible range and the Paschen (nf = 3), Brackett (nf...

*November 10, 2013 by a.m*

**Integral Calculus - Series**

Find if series is convergent or divergent. Series from n=2 to infinity (4n+7)/(3n^3 -8n)

*November 12, 2015 by John*

**English**

For the essay I have to write I have to talk about examples of sequences and montages (which are transitional sequences of rapidly edited images) for the movie "The Gold Rush" by Charlie Chaplin. I'm having a hard time with examples of montages. Can you help please?

*September 26, 2011 by Jon*

**Chemistry**

Hydrogen exhibits several series of line spectra in different spectral regions. For example the Lyman series (nf = 1 in Balmer-Rydberg equation) occurs in the ultraviolet region while the Balmer (nf = 2) series occurs in the visible range and the Paschen (nf = 3), Brackett (...

*November 10, 2013 by Andy*

**calculus**

Consider ∞ ∑ [(3k+5)/(k²-2k)]ᵖ, for each p ∈ ℝ. k=3 Show this series { converges if p > 1 { diverges if p ≤ 1 Hint: Determine the known series whose terms past the second give an approximate match for the terms of this series. This ...

*August 6, 2011 by Bernie*

**Calc 2, Series/Sequences**

Explain clearly in detail the difference of the summation of n=1 to infinity of 1/n^2; and the integral of 1/x^2dx with the limit of 1 to infinity, as well. Part 2: Explain the natures of the two expressions and explain why the summation is greater than the integral test. The ...

*April 1, 2010 by Alex*

**math**

the volume of a rectangular solid is given by expressions given below.in each case find the dimentions of the solid. a)15x^2-51x+18. b)x^3+13x^2+32x+20. c)x^2-5x/2-3/2. d)x^4+x^3-x-1 plz everyone help me out.till 2 o'clock...plz plz plz

*May 30, 2012 by parul*

**math**

the volume of a rectangular solid is given by expressions given below.in each case find the dimentions of the solid. a)15x^2-51x+18. b)x^3+13x^2+32x+20. c)x^2-5x/2-3/2. d)x^4+x^3-x-1 plz everyone help me out.till 2 o'clock...plz plz plz

*May 30, 2012 by PLZ HELP ME NOW...*

**Math (College Level Mathematics)**

Fourier sin series for f(x) = 1, 0 < x < Pie is given by 1 = 4/n E 1/ (2n-1) times sin (2n-1) x, (0 < x < n). Using this, find the Fourier sinc series for f(x)= 1, on 0 < x < c where c > 0. Then find the Fourier series for g(x), x > 0 where g(x) = 1, 0...

*September 21, 2013 by Joy*

**Calculus**

Obtain the MacLaurin series for 1/(2-x) by making an appropriate substitution into the MacLaurin series for 1/(1-x). ------------ The MacLaurin series for 1/(1-x) = Σ x^k I substitue (x-1) in for x, because 1/(2-x) = 1/(1-(x-1)) Making the same substitution in the ...

*June 25, 2009 by Sean*

**maths plz**

∫√(x²+1)/(x+1)dx plz show step i know it messy plz i really need it

*October 6, 2016 by Anonymous*

**pscychology**

Could someone pretty plz plz plz help me...What are the 2 biggest parts of the human brain??

*March 11, 2009 by Logan:)*

**Pre-Calculus**

Q.Determine the sum of each infinite geometric series. t_1= 8 r = -2^1/2 ---------------------------------------- A.This is a divergent series because the absolute value of r is greater than 1. ---------------------------------------- Q. The first term of an infinite geometric...

*February 17, 2015 by Lucina*

**SCIENCE!!--ANONYMOUS PLEASE ANSWER MY QUESTION!**

plz answer the question we were talking about plz plz. Go back to the problem. I got 184 but the worksheet answer says 136 which is correct?? plz help!! thx

*September 13, 2010 by Happy Face*

**Maths plz help**

X^x+y^y=31 x+y=5 plz help i was told to use newton litrate method plz help

*December 18, 2015 by Collins*

**Chemistry (Need) 7:00**

What characterizes the electron configurations of transition metals such as silver and iron? Thanks Alot in Advance.. Fe is in the 3d transition series and Ag is in the 4d series. Thus, the distinguishing electron for the 3d series enters the 3d orbital while those for the 4d ...

*November 12, 2006 by Lance*

**Calculus**

How can I prove this series alternating series converges(this is the answer)? (-1)^2*(2/3)^n I tried it this way: an = (2/3)^n, then i just broke it down. 2^n/(3^n) and i took the ratio of it and got 2/3 which does not equal to one which would mean the series diverges.. but ...

*July 26, 2013 by Isaac*

**College Calculus**

Suppose the series An (from n=1 to INF) is known to be convergent. Prove that series 1/(An) (from n=1 to INF) is a divergent series. I have no idea what to do... please help!

*March 24, 2008 by Mandy*

**College Calculus (Binomial Series)**

Expand f(x) = (x+x^2)/((1-x)^3) as a power series and use it to find the sum of series (SUM from n=1 to infinity) (n^2)/(2^n) PLEASE HELP.

*April 8, 2008 by Andrew*

**calculus**

With power series, is an endpoint convergent if you plug it back into the original series, and get an alternating series that is conditionally convergent?

*September 22, 2010 by Bob*

**math**

sorry for before it is my first time using this website and this is the real question in a geometric series t1=23,t3=92 and the sum of all of the terms of the series is 62813. How many terms are in the series?

*June 3, 2013 by Bob*