Tuesday

September 2, 2014

September 2, 2014

Number of results: 248

**calculus**

solve the logarithmic equation. Be sure to reject any value of x that is not in the domain. In square root x+7=1 x= ? What is the decimal approximation to the solution? x= ?
*January 1, 2013 by NayNay*

**Calculus Help**

use logarithmic diff. to find the derivative of the function. Show steps please! so I can see how it is done. Thank you so much! y=(e^(-x)cos^(2)(x))/(x^(2)+x+1)
*March 18, 2014 by Maho*

**Mathematics**

For the graphed function f(x) = (4)^(x - 1)+ 2, calculate the average rate of change from x = 2 to x = 4 -68 -30 68 30 Which logarithmic graph can be used to approximate the value of y in the equation 4y = 8?
*May 13, 2014 by Stokedtobehere*

**Precalculus **

I REALLY NEED HELP WITH THIS QUESTION, PLEASE HELP!! Give an example of a logarithmic function g, which has a vertical asymptote x = –2, and passes through the origin.
*March 3, 2010 by jh*

**precalc/trig**

Solve the Logarithmic equation algebraically. Give an Exact Answer and an approximation for x to four decimal places. 20 log(2x+2)=45
*December 5, 2011 by Alexander*

**calculus**

Use logarithmic differentiation to find the following derivative: y=(x+6)^4/(x-5)^6. Please show all step so I can understand for future reference.
*April 20, 2013 by anonymous*

**Calculus**

Use logarithmic differentiation to find the following derivative y=(x+6)^4/(x-5)^6. Please show all steps so I can follow for future understanding. Thanks.
*April 21, 2013 by Sean*

**Math**

Write the exponential equation in its equivalent logarithmic form. 5^4 = 625 I know I have to change it to log or ln and something is equal to I think either 4 or 5.
*July 29, 2011 by Ms. Tracy*

**Math**

Solve the logarithmic equation for x. Log3(x^2 − 5x − 9) = 3 I Have no idea
*November 22, 2011 by Anonymous*

**Math/Trig**

Which logarithmic equation is equivalent to L^m = E 1) LogL E = m 2) logE L = m 3) logm E= L 4) logE m= L
*February 11, 2012 by Charles*

**Calculus AP **

5.2 The Natural logarithmic function Differentiate the function problem # 13: f(x)= sqrt(x) Inx
*April 18, 2012 by jackie*

**math**

Give an example of a logarithmic equation that cannot be solved and explain why it cannot be solved. (3 marks)
*March 17, 2013 by Jonathan*

**prcalculus**

change the logarithmic expression to an equivalent expression involving an exponent. log416=x
*March 24, 2013 by deanne*

**Math- Alg 2**

Which logarithmic equation is equivalent to the exponential equation below? 3^x=28
*January 27, 2012 by CAMILA*

**math**

Give an example of a logarithmic equation that cannot be solved and explain why it cannot be solved.
*March 18, 2013 by Hasane*

**Math**

Write each logarithmic expression as a single logarithm: Log 2 + 3 log 1
*April 19, 2014 by Dominique*

**Math(Please help)**

Logarithmic differentiation f(x)=(2x-1)^-2 (x+3)^4 at x=1 f'(x)= -2*2/2x+1 + 4*1/x+3 [(2x-1)^-2)(x+3)^4 and then I plug in 1. I am having trouble getting an answer when I plug in 1.
*April 30, 2011 by Hannah*

**algebra**

express as an equivalant expression that is a single logarithmic and simplfy if poissible loga(2x+10)-loga(x^2-25)
*June 3, 2011 by mema*

**Math**

Solve the logarithmic equation. Please show all of your work. Loga(x+4) + loga(x-4) = 4
*June 8, 2011 by Bethany*

**algebra**

change the logarithmic expression to an equivalent expression involving an exponent. 4^16=x log (base4)16=x is it x=e^2?
*September 2, 2012 by alli*

**alg**

change the logarithmic expression to an equivalent expression involving an exponent. 4^16=x log (base4)16=x is it x=e^2?
*September 2, 2012 by alli*

**Have I done this right**

write the equations in logarithmic form 216 = ^63 answer In(e^4.5) 49 = (1/7) ^-2 answer 2=log(3x)
*May 13, 2014 by Nellie*

**college algebra**

Solve the logarithmic equation. Log x +log2x = 4 Wouldn't this be no solution because log x is undefined?
*April 24, 2013 by Deb*

**math;SOS**

solve the logarithmic equation. log(5x+7)=1+log(x-9)
*December 2, 2012 by kristina*

**Algebra**

I need to rewrite the following as an equivalent logarithmic yt = x I wrote logy=logt=logx. My teacher said that was wrong. Can someone guide me on the right answer?
*May 8, 2010 by dani*

**college algebra **

solve the logarithmic equation. Please show all work. log5x+log5(x-3)=log5(x+5)
*March 4, 2012 by Tammy*

**math**

Determine the value of each of the following logarithmic expressions. Do not change bases. A) log8 4 <----- 8 is subscript b)log 1/3 27 <---- 1/3 is subscript
*March 19, 2012 by mark*

**Calculus**

Use logarithmic differentiation to find derivative of y=x^x^2 x > 0. Please show all steps so I can follow the steps. Thank you.!
*April 20, 2013 by Sean*

**math -logarithm **

Write the equations in logarithmic form. (a) 729 = 93(9 to the 3rd power) (b) 25 = 1/5 −2( 1/5 to the -2 power) a = bc ( c squared)
*June 3, 2014 by leelee kay *

**Algebra**

Hi, I'm trying to learn logarithmic form and I'm kinda of stuck Write in exponential form: 1.log(3)6561=x 2.x^4 = 625 Thank you
*November 21, 2011 by Thomas*

**algebra**

Hi, I'm trying to learn logarithmic form and I'm kinda of stuck Write in exponential form: 1.log(3)6561=x 2.x^4 = 625 Thank you
*November 21, 2011 by Thomas*

**math**

chane the logarithmic expression to an equivalent expression involving an exponent log416=x **the 4 is supposed to be dropedd down lower by the g.**
*January 3, 2013 by Heather*

**Algebra**

Solve the logarithmic equation. log2(4x)-log2(x+3)=1
*July 29, 2011 by Meghan*

**math**

solve the logarithmic equation. log(5x+7)=1+log(x-9)
*December 2, 2012 by brad*

**Math**

Write the expression in terms of natural logarithms. (Express all logarithmic functions in terms of In(x) in your answer.) log[8.4](112)=
*October 30, 2012 by Ms. Jackie*

**Calculus**

Use logarithmic differentiation to find the derivative of the following: y=x^x^2 x>0 Please show all steps so I can following for future understanding
*April 21, 2013 by Sean*

**pre-calculus**

Change the logarithmic expression to an equivalent expression involving an exponent. Log7343=x the 7 should drop down lower than the 343.
*October 9, 2012 by ladybug*

**adv functions**

Hi! I need help with determining the value of each of the following logarithmic expressions. Do not change the bases- thx a) log[base8]4 b)log[base(1/3)]27
*April 7, 2013 by Julia*

**pre-cal**

use the properties of logarithms to condense the logarithmic expression. write the expression as a single logiarithm whose coefficient is 1. 2IN(x+3)-3INx
*October 9, 2012 by ladybug*

**math--please check**

Change the logarithmic equation to an equivalent equation involving an exponent. log8^64=2 **note that the 8 should be lower than the g** 8^(log64)=8^2 64=8^2 is this correct
*January 9, 2013 by Roger*

**Calculus**

Suppose that ax^2 + bx + c is a quadratic polynomial and that the integration: Int 1/(ax^2 + bx + c) dx produces a function with neither a logarithmic or inverse tangent term. What does this tell you about the roots of the polynomial?
*January 10, 2008 by mathstudent*

**Algebra**

For the exponential function ex and logarithmic function log x, graphically show the effect if x is doubled. I am having trouble figuring out my points to plot on the graph.
*February 16, 2009 by Mario*

**precalculus**

solve logarithmic equation in exact form only. show work. log_5(x-3)+ log_5(x-6)-log_5(x+1)=2
*January 15, 2012 by Sara*

**precalculus**

solve the logarithmic equation . express solution in exact form log5(x-9)+log5(x+4)=1+log5(x-5)
*November 11, 2011 by mz deedee*

**college algebra, Please help!!**

change the exponential expression to an equivalent expression involving a logarithm. 1.9=a^6 a=1.1129 is this the correct logarithmic expression???
*November 27, 2012 by Heather*

**Pre-Cal**

Solve the following logarithmic equation. Exact words only: log 3(x+4) = 2+log3(x-20) the 3 in the part of log (3)should be lower just didn't know how to type it in here
*January 1, 2013 by phyllys*

**Surds please help!**

(square root of a + 3 square root of b /a - b) - (2/square root of a + square root of b).
*March 6, 2014 by Jnr John*

**Algebra II**

How to solve Log (9x+5) - Log ((x^2)-1) = 1/2 16 16 (The 16 is from the logarithmic function : b) (y=log x) b Could anyone post the answer to this?
*May 18, 2010 by Anonymous*

**Math**

Solve the logarithmic equation. Express your solutions in exact form only. Please show all of your work. log3(x+2) + log3(x+8) – 2 = log3(x+3)
*June 9, 2011 by Allison - Carson*

**ALGEBRA**

Solve the exponential equation. Give the exact value for x. (Express all logarithmic functions in terms of ln(x) in your answer.) text((a) ) e^x = 10 x = text((b) ) e^x = 2.0 x = text((c) ) e^x = 37.9 x =
*April 25, 2012 by Randy*

**Algebra 2**

Can someone please explain to me how to solve logarithmic equations? Some examples are: -5=log2X 3^5x+1= 40 and log6X+(log6)7=(log6)35 I hope that makes sense because logs are hard to type.
*April 18, 2008 by JaneLee*

**Pre-Calculus**

I need help solving this logarithmic equation: ln x + ln (x+3) = 1. I know ln x + ln (x+3)=ln [x(x+3)] and that is ln x^2 + 3x when broken down. Then you have to get rid of ln by taking the natural base e of both sides so in the end you have x^2+3x = e^(1). That's when I got ...
*May 3, 2008 by Kelsey*

**Logarithmic Function help**

Ok, I was getting all my answers right until I stumbled on this one: 5e^0.2x=7 This is what I was doing: 5e^0.2x=7 5lne^0.2x=ln7 5*0.2x=ln7 0.2x=(ln7/5) ??? The answer is 5ln(7/5) but i do not know how they derived to this. Thank you so much!
*June 7, 2009 by Marlon*

**Calculus**

Find the solution of the logarithmic equation: ln(x+8)+ln(x–8)=0 Im not sure how to approach this one. I tried moving the ln(x-8) to the other side and solving for x and that did not work. I also tried putting everything as an exponent to e. please help! thanks
*October 29, 2010 by Adam*

**Algebra**

Evaluate the logarithmic equation for three values of x that are greater than 1, three values of x that are between 0 and 1, and at x=1. Show your work. y=log7 x
*June 13, 2010 by Tom Allison*

**Algebra**

Please help...Evaluate the logarithmic equation for three values of x that are greater than 1, three values of x that are between 0 and 1, and at x=1. Show your work. y=log7 x
*June 12, 2010 by J. Ed*

**Chemistry**

If the pH of grapefruit is 3 and the pH of beer is 5, how many times more acidic is the grapefruit juice than the beer? According to the logarithmic scale
*November 10, 2010 by Ash*

**Re: Algebra II **

How to solve Log (9x+5) - Log ((x^2)-1) = 1/2 16 16 (The 16 is from the logarithmic function : b) (y=log x) b Could anyone post the answer to this? 16 is supposed to be next to Log(16) but lower. This is for both the Logs in the equation.
*May 18, 2010 by Anonymous*

**Logarithmic Scales**

In 1995, Japan had an earthquake of magnitude 7.2. What is the magnitude of an earthquake that is twice as intense?
*March 28, 2012 by Anonymous*

**calculus**

use the properties of logarithms to condense the logarithmic expression. write the expression as a single logarithms whose coeffient is 1. Inx+In5=? Can you show work
*January 7, 2013 by Heather*

**solving logarithmic inequality**

0.2 <= logx < 2 take the antilog of each side.. 100.2 < x < 10^2
*February 23, 2007 by Jen*

**College Algebra**

Solve the logarithmic equation for x. log(base 3)(x+6) - log(base 3)(x+1)=1 urgent! help!
*December 4, 2012 by Patrick:)*

**College Algebra**

Solve the logarithmic equation. Express your solutions in exact form only. Please show all of your work. log base 6 (64x^3+1)-log base 6 (4x+1)=1
*January 18, 2012 by Jo *

**Algebra-Please check**

Write y = 10^(x) as a logarithmic function Choices are log(x)10 = y log(y)x = 10 log(10)y = x log(x)y = 10 I think it is log (10)y = x
*November 16, 2010 by Annie*

**Intermediate Algebra**

Can anyone help? I have a test and this is the last question I need answered. I'm lost and exhausted! Thanks for any help! Evaluate the logarithmic equation for three values of x that are greater than 1, three values of x that are between 0 and 1, and at x=1. Show your work. y...
*June 13, 2010 by Kris B*

**Math**

Select any concept from this week.(Linear equations,exponents, Logarithmic problems Write a 350- to 700-word response in which you examine the importance and applicability of this concept. Describe why this concept is important and how it can be applied to society in general
*March 29, 2012 by Tiara*

**maths**

Solve this logarithmic equation. 3 log 2 base x + log 18 base x = 2
*May 8, 2013 by Shane*

**maths**

Solve this logarithmic equation. 3 log 2 base x + log 18 base x = 2
*May 8, 2013 by Shane*

**Math - Logarithmic**

Is the following correct when restating logs with variables to exponential? Log: log_a(a^3) --- base = a Exp: a^3 = a I know when dealing with real numbers, this is what you do: Log: log(10^5) Exp: 10^5 = 100 000
*December 13, 2007 by Anonymous*

**Math - Logarithmic**

Log_8 = Log with the base of 8 log_8 (x-3) - log_8 (3x+11) = log_8 [1 / (x+1)] I use the quotient law for the left side and eliminate log_8. And then what? My Work: log_8 [(x-3)/(3x+11)] = log_8 [1 / (x+1)] [(x-3)/(3x+11)] = [1 / (x+1)] Answer: 7
*December 12, 2007 by Anonymous*

**logarithmic eq:**

3logx = 6-2x Thanks This is a problem that is best solved by iteration, or graphing. I recommend graphing. There is no closed-form solution. You need to solve it by graphical or iteration (trial and error) methods. The answer is approximately 2.43, if the log base is 10.
*February 23, 2007 by Jen*

**College Algebra**

For the exponential function e^x and logarithmic function log x, graphically show the effect if x is halved. Include a table of values for all four functions. Could someone please explain to me what occurs when things are halved.
*May 14, 2009 by Carmen*

**Algebra check**

Convert to Logarithmic equations. 10. 4^-3 =1/64 I have the answer as log4 1/64 =-3 11. 144^1/2 =12 I have the answer as log 144^12 =1/2 Are these answers right?
*November 30, 2008 by Shawn*

**calculus**

really stuck on these two, steps would be greatly appreciated. gotta find the derivative thanks! first one: f(t)=2^(log5t) the 5 is the base second one: y=(2(x^2) - 1)^5 /(√(x+1) for the second one you have to use logarithmic differentiation
*October 31, 2012 by nicole*

**calculus**

solve the following logarithmic equation. Be sure to reject any value of x that is not in the domain of orginal expression. then in the solution set round to two decimals places. Inx=8 I get e^8 But am having a hard time with rounding two decimal places. Can someone help?
*January 1, 2013 by Jennifer*

**ALGEBRA**

(a) Write the expression in terms of natural logarithms. (Express all logarithmic functions in terms of ln(x) in your answer.) log_(8.5) \(127\) = Give a calculator approximation (correct to four decimal places). log_(8.5) \(127\) ~=
*April 16, 2012 by Randy*

**ALGEBRA**

(a) Write the expression in terms of natural logarithms. (Express all logarithmic functions in terms of ln(x) in your answer.) log_(8.9) \(135\) = (b) Give a calculator approximation (correct to four decimal places). log_(8.9) \(135\) ~=
*June 12, 2012 by Urgen please help*

**Algebra**

Evaluate the logarithmic function for three values of x between zero and one, three values of x greater than 1, and at x=1. Show your work. Use the resulting ordered pairs to plot the graph. State the domain and the range of the function. g(x) = ln x + 2
*June 19, 2010 by Zen*

**college algebra**

write the expression as a single logarithm 1. In(x/x*2)+In(x+2/x)-In(x^2-4) solve the following logarithmic equation. 2. log_9(x-2)+log_9(x+1)=2 what is the exact solution? What is the decimal approximation for the solution when rounded three decimal places. please show work
*November 30, 2012 by confused--two questions please help/steve please*

**algebra**

Rewrite the following as an equivalent logarithmic equation.Do not solve. y^t = x answer logy+logt=logx-is this right also Express as an equivalent expression that is a sum of logt (3ab) the t is at the bottom of the g answer log3+loga+logb logarithms.
*May 5, 2010 by dani*

**Pre-Calculus**

Find the inverse function for the function f(x)=2^(x)+1/2^(x)-1 You will need to use some properties of logarithmic functions to find the inverse of this particular function.
*April 30, 2013 by Thomas*

**math**

Which logarithmic equation is equivalent to the exponential equation below? 9^x=27 A) 27 log9 x B) x log9 27 C) 9 log27 x D) x log27 9
*December 18, 2013 by Fran*

**Trigonometry**

Express each of the following as a single logarithmic expression. All exponents must be left in radical form: 1.) 2logx-3logy 2.) logx-logy+logz 3.) 1/3log5x+2/3log6x 4.) 2/3(logbase2 x - logbase2 y) I dont understand these problems at all. Can someone please solve and explain...
*May 19, 2012 by Nabil*

**algebra**

Evaluate the logarithmic equation for three values of x that are greater than 2, three values of x that are between 1 and 2, and at x=2. y = -log(sub)3 (x - 1) I don't know if I did this right, I changed it to -3^y=x-1. I am having difficulty replacing x and finding out what y...
*May 9, 2010 by Celest*

**algebra**

Evaluate each of the functions below at x = 1, 2, 4, 8, and 16. Plot the graph of each function. Classify each as linear, quadratic, polynomial, exponential, or logarithmic, and explain the reasons for your classifications. Compare how quickly each function increases, based on...
*March 23, 2011 by peg*

**algbra**

Evaluate each of the functions below at x = 1, 2, 4, 8, and 16. Plot the graph of each function. Classify each as linear, quadratic, polynomial, exponential, or logarithmic, and explain the reasons for your classifications. Compare how quickly each function increases, based on...
*March 23, 2011 by peg*

**Trig/Pre-Calc**

Need help with current Trig problem for tomorrow: Solve the logarithmic equation algebraically. Approximate the result to three decimal places. 6log3(0.5x)=11 I know to start off the equation you divide by 6. I know the answer is 14.988. I just am puzzled on how to receive the...
*May 16, 2011 by Eric*

**Algebra**

Evaluate the logarithmic equation for three values of x that are greater than 1, three values of x that are between 0 and 1, and at x=1. Show your work. Use the resulting ordered pairs to plot the graph State the equation of the line asymptotic to the graph (if any). y = (1/4...
*September 6, 2010 by Nicole*

**Algebra**

Evaluate the logarithmic equation for three values of x that are greater than 2, three values of x that are between 1 and 2, and at x=2. Show your work. Use the resulting ordered pairs to plot the graph. State the equation of the line asymptotic to the graph. y = log3 (x - 1)
*June 15, 2010 by Bobby*

**Math**

Evaluate the logarithmic equation for three values of x that are greater than 1, three values of x that are between 0 and 1, and at x=1. Show your work. Use the resulting ordered pairs to plot the graph. State the equation of the line asymptotic to the graph (if any). y= log 1...
*September 6, 2010 by Samantha*

**Math**

Do the following. (a) Write the expression in terms of natural logarithms. (Express all logarithmic functions in terms of ln(x) in your answer.) log 8.6 (114) =_____ (b) Give a calculator approximation (correct to four decimal places). log 8.6 (114)~~_____
*December 21, 2012 by Regina M*

**Math - Logarithmic**

Solve: 2log_3(x) - log_3(x-2) = 2 My Work: log_3(x^2) - log_3(x-2) = log_3(3^2) log_3 [(x^2) / (x-2)] = log_3(27) (x^2) / (x-2) = 27 x^2 = (x-2)(27) x^2 = 27x - 54 x^2 - 27x = -54 27x = -54 x = -2 Textbook Answer: 3 or 6 Where did I go wrong and how should I fix it?
*December 12, 2007 by Anonymous*

**engineering**

using air pressure, a ball of 0.5kg is forced to move through the tube lying in the horizontal plane and having the shape of a logarithmic spiral. If the tangential force exerted on the ball due to the air is 6N, determine the rate of increase in the ball's speed at the ...
*November 15, 2008 by sarah*

**Math (logarithmic functions)**

Those are the only ones I can't seem to resolve. Thank you! resolve x: 1) 9*3^0,51x = 315 2) 10*3^15x+21 =363*2^9x+51 3) log(15x^2) - log(3x) = 4*log(3) 4) log[of base 3]*(15x + 4) = 3
*April 6, 2011 by Ralph*

**math(Please help)**

1) use the properties of logarithms to simplify the logarithmic expression. log base 10 (9/300) log - log 300 log 9 = 2 log 3 log 300 = log 3 + log 100 = log 3+2 I just do not know how to put these together now!
*February 10, 2010 by Hannah*

**intermediate algebra**

Evaluate the logarithmic equation for three values of x that are greater than 1, three values of x that are between 0 and 1, and at x=1. show your work. use the resulting ordered pairs to plot the graph. State the equation of the line asymptotic to the graph (if any) y= -log5...
*September 6, 2010 by chihuahualover2010*

**urgent urgent algebra / precalculas**

rewrite each in exponential expression as a logarithmic expression log, x=4 log 5=2 log b=x
*March 22, 2013 by zachary*

**algebra**

Evaluate the logarithmic equation for three values of x that are greater than -1, three values of x that are between -2 and -1, and at x = -1. Show your work. Use the resulting ordered pairs to plot the graph; submit the graph via the Dropbox. State the equation of the line ...
*September 8, 2010 by Marlee*

**Algebra**

1)If y varies inversely as x and y = 3, when x = 6. Find y when x = 36. A)72 B)2 C)1/2 D)18 I chose C y1/x2 = y2/x1 3/36 = y2/6 18/36 = 1/2 2)Write the equation 4^-3 = 1/64 in logarithmic form. A)log64 = 4^3 B)log^-3 64 = 4 C)log^4 1/64 = -3 D)log^4(-3) = 64 I chose C 3)Solve...
*February 22, 2008 by Jon*

**Pre-calc Solve logarithmic **

ln sqrt(x-8)= 5 I would like help to solve this what i did was to take away the square root i squared both sides coming up with (ln sqrt(x-8))^2= (5)^2 ln(x-8)=25 am i alowed to do this with ln in the equation? then i subtract 8 from both sides ln x = 17 e^(ln x)= e^17 e ...
*October 30, 2013 by Marcos*

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