# What the heck is recursive? recursive: repeats Going up a stairwell is a recursion each step. knitting is a recursive process

5,560 questions
1. ## Math

What the heck is recursive? recursive: repeats Going up a stairwell is a recursion each step. knitting is a recursive process.

asked by Kiddy i am on June 14, 2007
2. ## 9th grade algebra (sequences)

Can you check my homework please? Given the following representations, tell whether it's arithmetic/geometric, find the difference/ratio, find the explicit formula, find the recursive formula, and the given term. (This whole question was in the form of a

asked by Alexis on January 16, 2017
3. ## Algebra

Write a recursive formula for the following sequences: 1) 1,6,11,16... 2) 4, 12, 36, 108... 3) A ball is dropped from an initial height of 10 feet. The maximum heights the ball bounces are as shown (10 ft, 6 ft, 3.6 ft, 2.16 ft) a-write a recursive formula

asked by INeedHelp on January 28, 2015
4. ## Java programming

A method can be directly or indirectly recursive and we will explore the differences. Discuss how and why would you trace a recursive method.

asked by Poohboi on January 2, 2018

For each of the following explicit descriptions of a sequence, find a recursive description; for the recursive ones, find an explicit rule. Assume sequences start from n = 1. 1. an = 2n2 − 3n 2. a1 = 4 and an+1 = an + 2 3. a1 = −8 and an+1 = an 2 4. an

asked by Sara V. on May 3, 2017

Is this correct? Write an explicit and recursive formula: -5,-4,-3,-2,-1... explicit: -5N+1 recursive:An-1+1

asked by Ellie on October 23, 2009
7. ## 9th grade alegbra - geometric sequence

Can you explain how to find explicit and recursive formula of geometric sequence given 2 terms? 23. a = -12, a = -6 ratio: -6/-12 = 1/2 explicit: a = ar^(n-1) -6 = a(1/2)^4 -6 = a(0.37) -0.010 = a??? a = -0.010(1/2)^n-1 recursive: a = ar a = -0.010(1/2)

asked by Alexis on January 19, 2017
8. ## 9th grade algebra (recursive formula)

Can you explain how to find a sub 1 in the following problem? 1. Given 2 terms in an arithmetic sequence, find the recursive formula. a sub 18 = 3362 , a sub 38 = 7362 Steps: a. Find difference: (7632 - 3362)/(38 - 18) = 4000/20 = 200 b. plug into

asked by Alexis on January 10, 2017
9. ## Pre-calculus

State whether the sequence is arithmetic or geometric, write a recursive and explicit formula and find the 10th term. 81, -27, 9, -3, 1... Sequence Type: geometric Recursive: _______ Explicit: ______ 10th Term: -1/243

asked by HELP on April 28, 2019
10. ## coding

1.write a C program to reverse the elements of array using recursive function(without using for and while loop). 2. write a C program to check the occurrence of an element in array using recursive function(without using for and while loop).

asked by alice on March 15, 2016

Question: Which recursive equation represents the pattern? 1 answer below » n an 1 1 2 6 3 12 4 19 Which recursive equation represents the pattern? an = an – 1 + 3n + 1 an = an – 1 + 3(n + 1) an = an – 1 + (n+3) an = an – 1 + (n-3) My answer is

asked by Steve on December 13, 2017
12. ## math

What is the recursive rule for an=2n+11? a1=13;an=an−1+2 a1=13;an=an−1+11 a1=2;an=an−1+11 a1=11;an=an−1+2

asked by Jay on December 22, 2016
13. ## Algebra 2 (Recursive Rule)

What is the recursive rule for the sequence? -7.4, -21.2, -35, -48.8, -62.5 I got an=an+1 -13.8 where a1=-7.4

asked by John Smith on March 5, 2018
14. ## math

Why is there two different formulas, recursive and explicit. When do you use it?

asked by mariam on March 5, 2017
15. ## Math

what is the recursive rule for the sequence -7.4, -21.2, -35, -48.8, -62.6 an=an-1+13.8 an=an+1+13.8 an=an+1-13.8

asked by Jessie on April 25, 2017
16. ## algebra

third term using the recursive rule f(1)=.2 for f(n)=2f(n-1)/5 + 1

asked by Anonymous on December 3, 2015

What is the recursive rule for the following sequence: -5, -3, -1, 1…? A. an = an n-1 - 5 B. an = an n-1 - 2 C. an = an n-1 + 2 D. an = an n-1 + 5

asked by ??? on November 2, 2018
18. ## Math

How to write a recursive rul for sequences. ex.) 1,3,4,7,11

asked by Vic on December 14, 2010
19. ## algebra

how to write recursive formula and give one example of one

asked by sara on September 18, 2014
20. ## Precalculus

Determine a recursive formula for the sequence: 2, 5, 10, 17,......

asked by G on September 8, 2012
21. ## math sequence

5th term for recursive sequence: a(1) = 1 a(n+1)=3a(n)-1

asked by jack on August 25, 2017
22. ## math

Find recursive and explicit formula for -40 -36 -32 -28

asked by John on November 18, 2013
23. ## math

Write a recursive formula for the sequence: 12,-1,-14,-27...

asked by Brittney on February 12, 2013
24. ## algebra

help I don't understand the recursive formula

asked by sami on September 18, 2010

which of these patterns are recursive? a) 3,6,12,24,48,96 b) 1,4,9,16,25,36, c) 1,3,9,27,81,243 d) 4,9,19,39,79,159

asked by Taylor on September 9, 2008
26. ## Math

Write recursive equation: 1/3,3,27,81,243

asked by Maria on April 2, 2014
27. ## Statistics

Find a recursive formula for the sequence: 1, -1, -7, - 25

asked by BoB on December 13, 2018
28. ## Algebra

Find the recursive formula of the sequence below: 12, 24, 36, 48

asked by INeedHelp on February 22, 2015
29. ## Algebra 1

What is the third term of the sequence defined by the recursive rule f(1)=2, f(n)=2f(n-1)+1? Please help.

asked by Sara on September 26, 2019
30. ## math

write a recursive formula for 8,6,4,2,0 then find a14

asked by kiddy on February 25, 2014
31. ## Algebra 2

Write in recursive form, an=3 a n-1 + 4, a1 =7, for n greater than or equal to 2

asked by jazzy on January 17, 2017
32. ## Math

tn - tn-1 = 2n + 3; t1 = 10 Find the first five terms in the sequence using this recursive formuls

asked by Kate on July 11, 2011
33. ## Algebra

Formulate the recursive formula for the following geometric sequence. {-16, 4, -1, ...}

asked by Britney on October 23, 2017
34. ## Math

Find the first five terms of the sequence using the recursive rule: a1 = 2/3, and An = 5a N-1

asked by Annie on March 20, 2013
35. ## Math

tn - tn-1 = 2n + 3 Find the first five terms in the sequence using this recursive formuls

asked by Kate on July 11, 2011
36. ## algebra II

I need help finding the first first 5 terms of the sequence in the recursive formula a=1?

asked by chrissy on March 25, 2009
37. ## Calculus

Write the first five terms of the sequence defined by the recursive formula an=2(an-1)+3 with a1=-2

asked by Lexi on December 21, 2018
38. ## Math

Write the first five terms of the sequence defined by the recursive formula an = 5an-1 -1, with a1=0

asked by Jay on December 11, 2017
39. ## database processing-computer management

The simplest form of binary relationship is : a)1:01 am b)1:N c)12:01:00 AM d)recursivE MY ANSWER IS B ,BUT I AM NOT SURE:)

asked by VEDRANA on June 23, 2012
40. ## math

what is the factorial of a negative number? The factorial function has singularities at the negative integers. You can see this as follows. For integers we define: (n+1)! = (n+1)n! and we put 0! = 1 So, from 0! you can compute 1! and from that you can

asked by chris on July 10, 2007
41. ## math

Write the first 5 terms of the sequences defined by the recursive formula t1= 7, tn= 2tn-1 - 3n, n>1

asked by Resetta on May 18, 2015
42. ## Algebra 2

Write a recursive formula for the sequence 15, 26, 48, 92, 180, ... Then find the next term.

asked by Mimi on May 17, 2012
43. ## linguistic

extend the following sentece to illustrate the recursive feature of language(syntax) what is there?

asked by ivy on March 9, 2009
44. ## algebra

Could someone check my work; 1. Generate the first five terms in the sequence using the explicit formula. yn = –5n – 5 –30, –25, –20, –15, –10 30, 25, 20, 15, 10 –10, –15, –20, –25, –30(my answer) 10, 15, 20, 25, 30 2. What is the

asked by lee on February 3, 2013
45. ## Algebra

5. The local soccer team won the championship a several years ago, and since then, ticket prices have been increasing \$20 per year. The year they won the championship, tickets were \$50. Write a recursive formula for a sequence that will model ticket

asked by Sandra on April 16, 2015
46. ## discrete mathematics

Give a recursive definition of the function ones(s) which counts the number of ones in a bit string s.

asked by Nikolay on May 15, 2011
47. ## Algebra 2

What is a recursive definition for the sequence 3, 5, 9, 17, 33..... My answer was adding muliple of numbers, is this correct?

asked by Lea on February 18, 2013
48. ## Algebra Recursive sequence help

I need some help as I'm totally lost! I need to find the first five terms of each recursive sequence. The n-1 on the problem shows it below the a. 1. A1=3 An=2a n-1- 3 2. C1=64, C2=32 Cn= Cn-2 - Cn-1/2

asked by Kris on March 31, 2013
49. ## Math

Write the first five terms of the sequence defined by the recursive formula a(n) = 2*(a(n - 1)) + 5 with a(1) = -3 -3, -10, -24, -43, -81 -3, -1, 3, 11, 27 -3, 2, 7, 12, 17 -3, 4, 18, 46, 102 I'm trying to do this the way I've always done them (and gotten

asked by Max on January 12, 2018
50. ## Algebra

My teacher said I have this backwards, Here is the question: Formulate the recursive formula for the following geometric sequence. {-16, 4, -1, ...} And here is my answer: A(n+1) = A(n) * -1/4 An+1 = An * r is An+1 = An * (-1/4) Please correct it

asked by Britney on October 25, 2017
51. ## math

1. Provide two examples of a function: (1) as a table of values and (2) as a graph. Explain the definition of a function. Be sure to include mathematical vocabulary in your response. 2. In a paragraph, explain what the domain and range is for the function

asked by lola on April 29, 2019
52. ## medical electronics

ABCD lemma is used in recursive least squares to Reduce computations Real time processing Reuse past values All of these

asked by biomedical signal processing on February 12, 2018
53. ## Algebra ll

Help please, I don't understand how to do this... Give an example of an arithmetic sequence that is found in the real world. Find the common difference and write a recursive and iterative rule for the sequence. Use one of the rules to find another term of

asked by Me and I on March 19, 2014
54. ## personaliyand social development

-----is considered a powerful tool in self- development because it permits children to represent and express the self more clearly. a. language, b movement, c. a large social network, recursive thought. my answer is a.

asked by daniela on August 1, 2014
55. ## Algebra

A = - 113 and A = -213 20 40 this is an arithmetic sequence and i have to find the explicit formula and the recursive formula how do i do that?

asked by Rebkea on October 1, 2008
56. ## algebra

For each of the following sequences, find an explicit and a recursive description of the pattern. Assume sequences start from n = 1. a. 1, -1, -3, -5... b. 8,2,3,9... c. -2, 0, 0, -2, -6...

asked by Sara V. on May 3, 2017
57. ## algebra 1

What is the third term of a recursive sequence that follows the pattern x - 7 and has a first term x = 100? May somebody explain the answer and how they got it? Thank you so much

asked by rachel on January 16, 2010
58. ## math

Write the recursive formula and the explicit formula for the sequence {3,6,12,24,48,...}. Show all work.

asked by lexi on April 30, 2019
59. ## algebra

A geometric sequence is defined by the general term tn = 75(5n), where n ¡ÊN and n ¡Ý 1. What is the recursive formula of the sequence?

asked by Fantasia on April 27, 2016
60. ## algebra

Write a recursive formula for the sequence formula 15,26,48,92,180,.. then find the next term. can someone please help me

asked by lee on February 5, 2013
61. ## Algebra2

write a recursive formula for the sequence 5,18,31,44,57 then find the next term. My answer is a1=5,an=an-1+13 The next term would be 70.

asked by Steve on February 19, 2017
62. ## Algebra II

Find the recursive formula for the following sequence and determine if the sequence is arithmetic or geometric. A) 3,7,11,15.... B) -5,-15,-75....

asked by Luisa on October 24, 2016
63. ## C++ programming

write a program C++ program and Use a recursive function that finds the n-th term using the following rule: tn=3tn-1+12tn-2 . please help me out!

asked by Riana on April 3, 2013
64. ## Algebra

Find a recursive rule for the sequence 3, 6, 12, 24, … I can't decide if it's a sub n= (2)n times sub n-1 or a sub n= 1/2 times sub n-1

asked by Emma on June 22, 2014
65. ## Algebra

For the following geometric sequence find the recursive formula and the 5th term in the sequence. In your final answer, include all of your work. {-4, 12, -36, ...}

asked by Britney on October 23, 2017
66. ## Algebra

For the following geometric sequence find the recursive formula and the 5th term in the sequence. In your final answer, include all of your work. {-4, 12, -36, ...}

asked by Britney on October 25, 2017
67. ## Algebra 1B

A geometric sequence is defined by the recursive formula t1 = 64, tn= tn-1/2 where n ∈N and n > 1. The sequence is A)-64, -16, -8, -4, -2, -1, ... B)64, 16, 8, 4, 2, 1, ... C)64, 32, 16, 8, 4, 2, ... D)64, 128, 256, 512, 1024, 2048, ... The answer is C

asked by Soleil on February 22, 2019
68. ## math

For the following geometric sequence find the recursive formula and the 5th term in the sequence. In your final answer, include all of your work. {-4, 12, -36, ...}

asked by S.A on October 2, 2017
69. ## Math

For the following geometric sequence find the recursive formula and the 5th term in the sequence. In your final answer, include all of your work. {-4, 12, -36, ...}

asked by Sara on September 29, 2017
70. ## algebra

thank you Steve for helping me out. Accurately classify the sequence and then create a corresponding explicit and recursive formula for finding the nth terms of each sequence. A. 32, 30, 28, 26,..... B. 9,-3, 1, - _1 .......

asked by matthew on September 12, 2017
71. ## Math-examples?

Can anyone give an example of recursive method, explicit method using the variable n?

asked by Helen on December 20, 2013
72. ## Math-examples?

Can anyone give an example of recursive method, explicit method using the variable n?

asked by Helen on December 20, 2013
73. ## math

what is the recursive formula when given the explicit formula for the geometric sequence

asked by Tori on June 24, 2016
74. ## Pre-Cal

Recursive Sequences: find a formula for: 1,1,2,3,5,8,13,21 It looks like the Fibonacci sequence. Take the first two numbers and add them to get the 3rd. take the 2nd and third to get the fourth...etc. yeah, but how would i write that into a formula?

asked by James on December 6, 2006
75. ## Math

Turn the recursive function into its equivalent explicit function: f(1) = 18; f(n) = f(n - 1) + 6; n is be greater than or equal to 2* How would I solve this? Any help is appreciated! Thanks! *The symbol for that is the > with a line under it, I couldn't

asked by Amelia on March 9, 2019
76. ## Algebra 1

The recursive rule for a sequence is f(n)= f(n-1) ———+5 2 The first term is 4. What is the third term? Please help.

asked by Sara on September 26, 2019
77. ## Geometry

what is the third term of a recursive sequence that follows the pattern 5x-3 and has a first term x =2?

78. ## Algebra 2 Explict Rule

THe explict rule for a sequence is given. an=4n-1 What is the recursive for the sequence? I got a1=3 ; an=an-1+4

asked by John Smith on March 5, 2018
79. ## check!

Write a recursive formula that generates the terms of the following: . . .1, 3, 9, 27 my answer: t1=1, n>2 --> tn= 3tn-1 is this correct? Let's test You have the sequence 1, 3, 9, 27 ... You wrote t1=1, n>2 => tn= 3tn-1 What is t2? It's undefined so I

asked by ben! on October 19, 2006
80. ## Math

Sequence Geometric or Arithmetic Constant Ratio/Difference -2 4 10 16 22 Arithmetic 6 Recursive Function f (1) = -2 f (x) = f (x - 1) + 6 What would the explicit function be? I understand the rest just not this it is to confusing.

asked by James Doyle on January 1, 2019
81. ## Algebra 1

A geometric sequence is defined by the general term t^n = 75(5^n), where n ∈N and n ≥ 1. What is the recursive formula of the sequence? A) t^1 = 75, t^n = 5t^n - 1, where n ∈N and n > 1 B) t^1 = 75, t^n = 75t^n - 1, where n ∈N and n > 1 C) t^1 =

asked by Kira on October 23, 2018
82. ## Discrete Math

so i have this description: S consists of all strings of a's, b's and c's where an increasing number of a's come before an increasing number of b's and c's or c's and b's. does this make sense for this recursive definition of the set S over {a,b,c}: 1. a

asked by Rey on July 12, 2012
83. ## Math Alg. 2

Write a recursive rule for the sequence: 1,2,12,56,272... and 2,5,11,26,59... and -3,-2,5,-3,-2... I can't find the pattern in these and am unsure on how to write the rule. Thanks

asked by Student_10225 on February 25, 2015

1. The explicit formula an = 2-5 (n-1) represents an arithmetic sequence. Write the recursive formula for the sequence.

asked by Nunyo on October 22, 2018
85. ## math

I'm having trouble just starting this problem You receive a \$500 gift and decide to use it to start saving for a car. You add \$50 dollars a week from your part time job. Write the recursive definition for an arithmetic sequence that models this situation.

asked by MathlessinCarolina on October 5, 2015
86. ## Algebra

Write a recursive formula for the sequence 5, 18, 31, 44, 57, ... Then find the next term. I’m thinking that the answer is A. A. a1=-8; an=an-1+13. The next term is 70 B. a1=5; an=an-1+13. The next term is 70 C. a1=5; an=an-1-13. The next term is 83 D.

asked by Emma on March 8, 2019
87. ## DISCRETE MATH

Determine whether the following is a recursive or explicit. Then, find the first four terms of the following sequence. a) a_n = 〖na〗_(n-1) where a_0 =5 b) a_n = a_(n-1) + 3a_(n-2) where a_0 = 1 and a_1 =2 c) a_n = 2^n + 5•3^n for n=0,1,2,3

asked by roze on October 30, 2016
88. ## Algebra help

I need some help I posted the first question to this a bit ago but didn't enter it correctly so sorry to those who helped! I also have a 2nd half which I understood till they added the dividing part. I need to find the first five terms of each recursive

asked by John on April 1, 2013
89. ## computers

The recursive algorithm of the 4th Section of the chapter "Computational Geometry" employs a trick of presorting, in which we maintain two arrays X and Y of the input points P sorted on coordinate x and y, respectively. The algorithm starts with sorting

asked by roba on November 14, 2009
90. ## Algebra

Is this sequence 10, 15, 20, 25, 30 an arithmetic or geometric sequence? Then find the explicit formula and recursive formula for the given sequence.

asked by Steph on May 17, 2016
91. ## calculus

1) Integrate Cos^n(x) dx 2) Integrate e^(ax)Sinbx dx 3) Integrate (5xCos3x) dx I Will be happy to critique your thinking on these. 1) Derive a recursive relation. 2) Simplest by replacing sin(bx) by Exp[i b x] and taking imaginary part at the end. 3) First

asked by Febby on April 13, 2007
92. ## Algebra

Chantel drew a picture of her dog on a piece of paper that is 12 centimeters long. She used a copy machine to enlarge her drawing. She used the 115% setting to make each new copy. She then used each new copy, using the same copier setting. Enter an

asked by Ana on April 27, 2016
93. ## Grammar

Under the rule of punctuating sentences. Does this sentence seem right.or does the original sentence need no change. (1- Original Sentence) Between the sixth and seventh floors of the building in the stairwell over in the corner. My answer- The ball

asked by PatriciaQuinn on October 31, 2006
94. ## algebra

A rare bacterial culture is being grown in a lab. As the days progress, the cells multiply and grow. After 1 day, there is only 1 cell. After 2 days, there are 9 cells. After 3 days, there are 20 cells. After 4 days, there are 34 cells. Which recursive

asked by Steve on August 25, 2017
95. ## math30

A sequence has a first term of 24 and every other term is one half of the previous term. Find a recursive formula that defines this sequence. The answer of this question is: an=an-1*1/2 Somebody can help me and let me know why is 1/2 on the formula? please

asked by alejandro on August 22, 2012

A playground is being designed where children can interact with their friends in certain combinations. If there is 1 child, there can be 0 interactions. If there are 2 children, there can be 1 interactions. If there are 3 children, there can be 4

asked by Steve on August 22, 2017
97. ## English

Between the sixth and seventh floors of the building in the stairwell over in the corner. Hi Teacher, how in the world do i fix this? Thank you for using the Jiskha Homework Help Forum. Sorry, but whatever you want fixed does not show! Between the sixth

asked by Anonymous on July 20, 2007
98. ## Algebra 2

Write the first five terms of a sequence. Don’t make your sequence too simple. Write both an explicit formula and a recursive formula for a general term in the sequence. Explain in detail how you found both formulas. My answer is 15, 30, 45, 60, 75 I

asked by Math Noob on March 6, 2019
99. ## math30

A sequence has a first term of 24 and every other term is one half of the previous term. Find a recursive formula that defines this sequence. The answer of this question is: an=an-1*1/2 Somebody can help me and let me know why is 1/2 on the formula? please

asked by alejandro on August 23, 2012
100. ## applicable maths--sequence

hello, i need some practises on: 1)the language and notation of sequence. 2)Recursive definition for a sequence 3)the Nth therm or general term for a sequence. can someone please give me some useful website regarding the topics above (or any other possible

asked by Ann on May 3, 2008