Saturday

January 31, 2015

January 31, 2015

Number of results: 16,212

**Calculus - Partial Fractions**

What is the integral of 7e^(7t) Divided By e^14t+13e^7t+36 Using partial fractions
*March 14, 2008 by Sean*

**Calculus (Partial Fractions)**

My Calculus class just started Partial Fractions, and I understand MOST of it. I'm having a slight problem though, when either C, or C and D come in. I understand A/(something) + B/(something) But I become confused when it's either A/(something) + B/(something) + C/(something...
*February 24, 2008 by Sean*

**Calculus - Integration**

I came across this problem in my homework, and I was wondering if partial fractions would be rational for this problem. Int [(2x)/((x^2)^2)]dx If I don't use partial fractions, what would I use?
*May 9, 2008 by Sean*

**Binomial**

Help me on this one :( Express y= (7-3x-x^2)/[((1-x)^2)(2+x)] in partial fractions. Hence, prove that if x^3 and higher powers of x may be neglected, then y=(1/8)(28+30x+41x^2) I did the first part of expressing it in partial fractions. (Since it's very difficult to type out ...
*March 3, 2010 by Keira*

**Math- Partial Fractions**

Decompose the following into partial fractions after factoring the denominator as much as possible. Please show some work so I can understand how you did it. 1)x^2/((x-1)(x^2+5x+4)) 2)(3x^3-5x^2+12x+4)/(x^4-16) 3)1/(x^2 (x+1)^2 ) 4)(x+1)/((x^2+1) 〖(x-1)〗^2
*April 4, 2013 by Chris*

**Calc II**

Perform long division on the integrand, write the proper fraction as a sum of partial fractions, and evaluate the integral: (integral of) 2y^4dy/y^3 - y^2 + y - 1 After long divison I get: (integral of)2ydy + 2(integral of)dy + (integral of) 2/y^3 - y^2 + y - 1 I keep getting ...
*December 6, 2009 by Jenna*

**calculus**

Find the partial fractions for (3x^2-7x+12)/(x-2)(x^2-2x+5)
*March 6, 2013 by Joseph79*

**calculus**

Decompose 58-x/x^2-6x-16 into partial fractions.
*May 15, 2011 by Eileen*

**Calc easy**

Having trouble getting the correct solution. The integral of x squared in the numerator and x squared plus x minus 6 in the denominator. S X2 / (X2 + x 6) dx Thanks! That's a messy one. According to my table of integrals. The answer is -x/6 -(1/72)loge(x^2 +x -6) + S dx...
*February 23, 2007 by Ang*

**calculus**

how to you use partial fractions to compute the integral of ax/((x^2)-bx)dx?
*March 16, 2008 by mika*

**calculus**

INTEGRATION USING PARTIAL FRACTIONS a) 4x^2-3x+2 / x^3-x^2-2x dx b) x^2 / (x+1)(x+1)^2 dx c) 3-3x / 2x^2+6x dx d) x^2+2x-1 / (x^2+1)(x-1) dx ##anybody can help me for this question?
*December 4, 2012 by kchik*

**calculus**

integrate (x+2)/((x^2+2x+4)^2) the usual partial fractions dont work???
*March 3, 2008 by matt*

**Calculus - Partial Fractions**

I've set a problem up, something like this. s^4: A+D=0 s^3: -2A+B-3D+E=0 s^2: 2A-B+C+3D-3E=0 s^1: -2A+B-D+3E=4 s^0: A+C-E=4
*March 24, 2008 by David*

**calculus**

find the exact length of the curve y = ln(1-x^2), 0 <= x <= (1/2) So by doing the work I eventually get down to integral from 0 to 1/2 (1 + x^2)/(1-x^2) dx but I keep getting -1 + 1/(x-1) - 1/(x+1) after partial fractions which gives the answer ln(1/3) - 1/2 when I ...
*March 13, 2013 by Daniel*

**Calculus**

2x -------- (x-2)(x+2) using partial fractions That's supposed to be a division sign of some sort
*May 21, 2014 by Laurie*

**Calculus**

2x -------- (x-2)(x+2) using partial fractions That's supposed to be a division sign of some sort
*May 22, 2014 by Kristin*

**Calculus **

Find the integral of x/ (x^4+x^2+1) from 2 to 3. I was going to integrate using the method for partial fractions but I can't factor x^4+x^2+1.
*January 22, 2011 by Rachel*

**Calculus B**

The Antiderivative of: (2x+3)/((x^3)+3x) This one is devinately integration by partial fractions but im not sure what i am doing wrong. PLEASE HELP.
*March 28, 2011 by Brandon *

**Calculus**

Integral of x sq/(1+x sq) dx I am not sure how to do this, am i supposed to do partial fractions to break it up? Or is it just some simple substitution?
*December 7, 2009 by O_o Rion*

**calculus**

what is the integral of x^2-x+6/x^3-3x? the process involves partial fractions, and the answer is supposed to include ln and arctan... i just dont know how to get there.
*March 1, 2008 by belinda*

**calculus**

what is the integral of (x^2-x+6)/(x^3-3x)? the process involves partial fractions, and the answer is supposed to include ln and arctan... i just dont know how to get there.
*March 2, 2008 by belinda*

**calculus**

how do you evauste the intergral intergral (2x^4-2x^3+6x^2-5x+1)/(x^3-x^2+x-1)dx using partial fractions method?
*August 6, 2008 by Ann*

**Calculus AB**

Please help me integrate this equation using partial fractions: Integrate [(x^2+5)/(x^3-x^2+x+3)]dx. Thank you very much.
*June 5, 2011 by JAE92*

**Math/Calculus**

How would I integrate the following: (2x^2 + 5)/((x^2+1)(x^2+4))dx I think I would start with making it a sum of two partial fractions.
*May 29, 2007 by COFFEE*

**Maths-Integration by Partial Fraction**

Use integration by partial fractions to find Integral (3x^2-x+2)/(x-1)(x^2+1) dx
*December 12, 2012 by Anonymous*

**Partial Decompostion Fractions**

Can you please help me with the following questions please, I dont understand them. I know the general rule about them. Write the partial fraction decomposition of the rational expression. (x^2+4x-1)/(x^2+3)^2 (4x^3+4x^2)/(x^2+5)^2
*November 17, 2007 by Soly*

**Algebra-Partial Fractions**

Can you please help me with the following questions please, I dont understand them. I know the general rule about them. Write the partial fraction decomposition of the rational expression. (x^2+4x-1)/(x^2+3)^2 (4x^3+4x^2)/(x^2+5)^2
*November 19, 2007 by Soly*

**calculus**

evaluate integral or state that it is diverges integral -oo, -2 [2/(x^2-1)] dx ----------------------------------- integral -oo, -2 [2/(x^2-1)] dx Through partial fractions, I came up with lim [ln(x-1)-ln(x+1)] b, -2 b->-oo I get (ln(3)-0)-(oo-oo)). The answer in the back ...
*February 11, 2008 by Anonymous*

**partial fractions**

(7x^2-16)/(x^2-2x) solve by using partial fraction decomposition. i cant figure out how to do this because after i split up the bottom the A and B dont end up having an x^2 in order to equal the numerator of the original fraction. so confused!
*July 20, 2011 by gabs*

**Math**

Calculate the integrals by partial fractions and using the indicated substitution. Show the results you get are the same. dx/1-x^2; substitution x= sin pheta I understand how to do the partial fraction part, but not the second part and I dont know how they are similar. Any ...
*February 25, 2008 by Jessica*

**CALC 2 - Partial Functions!!**

How do I solve Integral of 7/(16-x^2) I know I must break down (16-x^2) into (x+4)(-x+4), but after I do that what is next? Using the method of partial fractions, convince yourself that 7/(16-x^2)= (7/8)*[1/(4+x) + 1/(4-x)] The two additive terms can be integrated by the ...
*June 13, 2007 by Ace*

**calculus**

I am working on this problem and having some trouble. We're supposed to use partial fractions. The problem is: integral of dx / (x^6-1) . I got the values of A and D, but I am having trouble with the others. Help please!
*January 22, 2009 by Liz*

**Calculus AB**

I had to integrate [(x^2+1)/(x^2-x)]dx with partial fractions. My answer was 2ln abs(x-1) -ln abs(x)+C. But the answer on the answer sheet has an extra +x that I did not account for. Is that a typo or did I integrate incorrectly?
*June 6, 2011 by JAE92*

**Mathematics**

Thanks you kindly. Express (2x^2-5x-5)/((2x^2+5)(4x-5)) in partial fractions.
*October 1, 2008 by WarmLingQi*

**maths**

Evaluate using partial fractions x^4 - 16/x^3 - 8
*February 6, 2012 by victor.m*

**maths**

express x-1/(x+1)(x-2)^2 into partial fractions
*February 16, 2012 by chrystabelle*

**maths**

Resolve 3x/x^2-x-12 into partial fractions
*March 22, 2012 by daka*

**Maths- Integration by partial fractions**

Integral (3x^2-x+2)/(x-1)(x^2+1) dx
*December 12, 2012 by Anonymous*

**math**

Express (15x^2+5x+2)/(2-x)(1+2x^2) in partial fractions.
*June 5, 2013 by Regina*

**math**

Express (15x^2+5x+2)/(2-x)(1+2x^2) in partial fractions.
*June 5, 2013 by Regina*

**math**

Express (15x^2+5x+2)/(2-x)(1+2x^2) in partial fractions.
*June 5, 2013 by Regina*

**math**

Express (15x^2+5x+2)/(2-x)(1+2x^2) in partial fractions.
*June 5, 2013 by Regina*

**math**

Express (15x^2+5x+2)/(2-x)(1+2x^2) in partial fractions.
*June 5, 2013 by Regina*

**math**

Express (15x^2+5x+2)/(2-x)(1+2x^2) in partial fractions.
*June 5, 2013 by Regina*

**math/algebra**

Express x^2 - 3x x^2 - 1 As partial fractions
*March 12, 2014 by sly*

**math/algebra**

Express x^2 - 3x/x^2 - 1 As partial fractions
*March 12, 2014 by sly*

**Math**

Resolve in partial fractions (x+6)/((x^2+1)(x-2)^2) Using let x = ...
*November 22, 2014 by Anonymous*

**chemistry**

The time dependent concentration of solute particles in a solution is given by c(r, t) = [n/8(pi D t)^(3/2)] e^(-r^2 /4 D t) where r^2 = x^2 + y^2 + z^2 with x, y, and z being the values of three components of the position in the Cartesian coordinate system. a) Show that the ...
*December 2, 2009 by drifting*

**Maths**

Resolve into partial fractions: (x+3)(x+1)/ x(x^2+x+1) Can anyone please help me out?
*November 15, 2007 by Claire*

**calculus**

find the second-order partial derivatives of f(x,y)=x^3 + x^2y^2 + y^3 + x+y and show that the mixed partial derivatives fxy and fyx are equal
*March 7, 2012 by maggie*

**chemistry**

When determining partial negatives and partial positives, does the partial postive go with the more electronegative atom? Ex: C=O, the polarity arrow goes toward the O because its more electronegative than the C but which atom gets the partial negative and which has the ...
*October 3, 2007 by AMY*

**Math**

By the method of the fractions partial determine the function f (t) of the following functions F (s). F(s)= s^2+7s+12/(s+2)(s+4)(s+6) F(s)= (s+3)(s+6)/s(s^2+10s+24) F(s)= 5(s+2)^2/s(s+1)^3 F(s)= s+6/s(s+1)^2 F(s)= 27/(s+1)^3(s+4)
*March 4, 2012 by SILVA*

**Maths**

If z=(x^n) f(x/y), where f is an arbitrary function, show that: x(partial z/partial x) + y (partial z / partial y) = nz Can someone please show me how to work it out? Thanks!
*February 3, 2010 by Claire*

**Calculus Please check**

Please check my answers and let me know if I did something wrong. Thank you! Find the partial derivative of x, and the partial derivative of y, then the partial derivative of x (1,-1), and the partal derivative of y (1,-1). f(x,y) = x^4 y^2 -x here is what I got @f/@x = 3x^3 y...
*November 20, 2014 by Jennifer *

**calculus**

Assuming that: Definite Integral of e^(-x^2) dx over [0,infinity] = sqrt(pi)/2 Solve for Definite Integral of e^(-ax^2) dx over [-infinity,infinity] I don't know how to approach the new "a" term. I can't use u-substitution, integration by parts, partial fractions, or trig ...
*January 14, 2008 by mathstudent*

**math**

using method of partial fractions to decompose this 1/(x-3)(x+3) is 1/6(x-3)-1/6(x+3) correct or have i gone wrong somewhere
*October 24, 2009 by mousey*

**Calculus - Integrals**

I made this question, just wanted to make sure it didn't drown under the tide... I've set a problem up, something like this. s^4: A+D=0 s^3: -2A+B-3D+E=0 s^2: 2A-B+C+3D-3E=0 s^1: -2A+B-D+3E=4 s^0: A+C-E=4 Count Iblis -It's easier to substitute for s the values that make the ...
*March 25, 2008 by David*

**Calculus**

State the growth factor in each of the following situations. Newspaper readership is declining by 7 1/3 % per year. A bouncing ball rebounds to 1/3 of its previous height. Dont know how to solve these fractions:\ I just hate working with fractions.
*September 21, 2011 by Anonymous*

**math**

Express (5x+2)/(2x-1)(x+1) into partial fractions and hence expand the expression as a series in ascending power of x giving the first 4 terms
*April 25, 2013 by mel gibbs*

**Cal II**

express integrand as sum of partial fractions and evaluate the integral. My answer is 3 ln x + -2ln(x+2). But the choices are nothing like this. What am i doing wrong??
*October 28, 2013 by UGH! *

**Chem**

At 930 K, Kp = 0.30 for the following reaction. 2 SO2(g) + O2(g)=>2 SO3(g) Calculate the equilibrium partial pressures of SO2, O2, and SO3 produced from an initial mixture in which the partial pressures of SO2 and O2 = 0.51 atm and the partial pressure of SO3 = 0 (exactly...
*November 9, 2014 by Opi*

**Calc**

integral (x^3)/(x^2-2x+1) from -1 to 0 How do you get this integral? I was doing partial fractions and got A/(x-1)+B/(x-1), A+B=x^3, but that should equal 0 so where do I go from there?
*March 3, 2013 by Anonymous*

**Algebra**

Is this right? Decompose into partial fractions. (2x^2-24x+35)/(x^2+2x-7)(x-2)= (Ax+B)/(x^2+2x-7)+C/(x-2) =Ax^2+Bx-2Ax-2B+Cx^2+2xC-7C =(A+C)x^2+Bx+2(Ax+Cx-B)-7C A+C=2 2Ax+Bx+2Cx=24 -2B-7C=35 A=2-C B=(35-7C)/(-2)
*April 18, 2008 by Anonymous*

**math -fractions**

ordering fractions 1/2,7/8,9/10,1/3,3/5,1/4 write the above fractions in order.
*January 10, 2011 by arjel*

**Algebra 1-Fractions**

Or, eliminating fractions, I should say. So, I need some help. See, I am really not a big fan of fractions. But I need to eliminate fractions to do a math problem. First one is 1/2-x=3/8. I know how to find LCD, then multiply both sides, distributive property, etc etc. But ...
*September 16, 2013 by Breighton*

**math fractions**

ADAM WANTS TO COMPARE THE FRACTIONS 3/12,1/6,AND1/3.HE WANTS TO ORDER THEM FROM LEAST TO GREATEST AND REWRITE THEM SO THEY ALL HAVE THE SAME DENOMINATOR?EXPLAIN HOW ADAM CAN REWRITE THE FRACTIONS?If anyone could helpme explain this to my 4 th grader.i am really bad with fractions
*February 26, 2013 by ttuuffyy*

**Chemistry**

Heat Capacity at constant volume: CV = (partial q / partial T) with V constant since volume is constant, work is zero and dq = dU, so CV = (partial U / partial T) with V constant Delta U = CV * Delta T Does this final relationship hold during a reaction where volume is NOT ...
*March 4, 2009 by jake*

**Chemistry**

If N2 is added to a balloon that contains O2 (partial pressure 450 mm Hg) and CO2 (partial pressure 150 mm Hg) to give a total pressure of 850 mm Hg, what is the partial pressure of each gas in the final mixture?
*April 10, 2013 by Ryan*

**Chemistry**

If N2 is added to a balloon that contains O2 (partial pressure 450 mm Hg) and CO2 (partial pressure 150 mm Hg) to give a total pressure of 850 mm Hg, what is the partial pressure of each gas in the final mixture?
*April 12, 2013 by Ryan*

**Algebra 2**

What is the result when you decompose 2x^2-19x+50/(x+3)(x-2)^2 into partial fractions? To clarify, the entire first line is over the entire second line
*June 2, 2013 by Danni*

**AP Calc BC**

Hi! Thank you for your help How do you find the antiderivative of 2/((x^2)+1) "two over (x squared plus one)" I think I have to do integration by partial fractions but I didnt figure it out...assistance is much appreciated Thank you very much
*November 29, 2010 by APpreciative student*

**math!!!!!!!!!!!!!!!**

( egyptian fractions are fractions where the numerator can only be one) find two egyptian fractions where when added together it equalls 11/32
*May 8, 2012 by livy*

**calculus**

a)find the first partial derivatives of f(x y)= x √1+y^2 b)find the first partial derivatives of f(x,y)= e^x ln y at the point (0,e)
*March 11, 2012 by maria*

**Algebra 1**

c. multiplying x/6-5/8=4 by 6 did not eliminate all the fractions/ What could you have multiplied to get rid of all the fractions? Explain how you got your answer and write the equivelent equation that has no fractions. HELP ME PLEASE!!!!!!! I don't understand this.
*May 11, 2009 by Kelsie*

**Calc**

Classify all critical points of the function f(x,y)=x^2-y^2+4x-2y+1. I know I have to take the partial derivative and set them equal to zero to get my points and then use the Hessian. For some reason I am not getting the correct answer. partial d/dx 2x+4 and partial d/dy 2y-2 ...
*December 9, 2007 by Britt*

**Calculus**

Find the partial derivative for x. f(x,y)=1/SQRTx^2+y^2
*December 1, 2011 by Jane*

**Calculus**

How can I get partial sums of a series on a TI 89 calculator?
*November 26, 2013 by Robin*

**math**

Separate the fractions 2/6,2/5,6/13,1/25,7/8and 9/29into two categories: those that can be written as a terminating decimal and those that cannot. Write an explanation of how you made your decisions. b. Form a conjecture about which fractions can be expressed as terminating ...
*September 27, 2009 by Anonymous*

**Math**

Shelly and Marcom are selling popcorn for their music club. Each of them received a case of popcorn to sell. Shelly has sold 7/8 of her case and Marcon has sold 5/6 of his case. Which of the following explains how to find the portion of popcorn they have sold together? A.Add ...
*November 8, 2012 by Jerald*

**chemistry**

A gaseous mixture at a total pressure of 1.50 atm contains equal molar amounts of He, Ne, and Ar. At constant temperature CO2 gas is added to the mixture until the total pressure is 3.00 atm. Which of the following is a correct statement concerning partial pressures after the ...
*April 18, 2008 by Sam*

**fractions**

the sum of two fractions is 7/12. therre difference is 1/12. they have the same denominators. what are the two fractions?
*January 20, 2011 by jayjay*

**Pre-Calculus(Help)**

Partial Fraction of the Rational Expression: x^2+x+8/x^3+x
*December 4, 2011 by Joshua*

**calculus**

How do I take the partial derivative of P with respect to r of the following: D ~ P = (t=1 to T)[t ~ (CF)_t/(1+r)^t ]
*July 7, 2012 by David*

**calculus**

Z=square root of(x^2+y^2) + xy Find the partial derivatives: x, xx, y, yy, xy. Thanks.
*September 24, 2014 by jean*

**calc II**

Express the integrals as the sum of partial fractions and evaluate the integral: (integral of) (x^2)dx/(x-1)(x^2 +2x+1) My work: The above integral is equal to x^2dx/(x+1)^2 (A/x-1) + (B/x+1) + (Cx+D)/(x+1)^2 = x^2 A(x+1)^2 + B(x-1)(x+1) + (Cx+d)(x-1) = x^2 Ax^2 + 2Ax + A + Bx...
*December 6, 2009 by Jenna*

**Math(Please help)**

Evaluate: f(x,y)=2x^3e^y a) partial derivative with respect to x. I know that you have to treat y as a constant but I have no idea what to do. I do not understand partial derivatives at all. Please help!! b) partial derivative with repsect to y.
*April 29, 2011 by Hannah*

**calculus**

find the partial derivatives du/dx, du/dy and du/dt. u= root (r^2+s^2, r = y + x cos(t), s = x + y sin(t);when x = 0, y = 2, t = 2
*October 10, 2011 by Ramesh*

**Calculus**

Find all first partial derivatives: f(x,y)=e^(xy)cosx
*May 31, 2013 by Elyse*

**Calculus II**

using integration by partial fraction, prove that pi + integral from 0 to 1 of x^4(1-x)^4/1+x^2 = 22/7
*April 6, 2014 by chelsea *

**Chemistry**

1.) What are the equilibrium partial pressures of CO and CO2 if co is the gas present initially, at a partial pressure of .912 atm. Kp = 19.9 Fe2O3 + 3CO <--> 2Fe + 3CO2 I'm trying to find partial pressure of both CO and CO2 by calculating for "x" in the equilibrium problem
*May 8, 2012 by Ali *

**Calculus**

The problem I have is a summation from 1 to infinity for (-1)^n/n. I have to find a partial sum that is in 0.001 of the infinite sum, my teacher says the fourth partial sum approximates the infinite sum, which is -7/12. I think to get within 0.001 of the infinite sum, do I ...
*May 5, 2009 by Sophie*

**chemistry**

The air exhaled by an average human being might have the following typical combustion, expressed in terms of partial pressures: N2 = 569torr; O2 = 116 torr; CO2 =28 torr; water vapor = 47 torr. what are the mole fractions of each?
*November 25, 2012 by Annie*

**CHEMISTRY**

during column chromatography, if four fractions are done, how do we know what is in each beaker and why. I know that beakers 1 and 3 will contain the majority of the fractions being separated but what about beakers 2 and 4. How do we know that they are the residues of the ...
*October 22, 2007 by Del*

**Math**

Frank teacher was teaching the class about fractions. She posted the fractions 1/7 and 3/9 on the board. Frank was supposed to answer what the least common multiple of the two fractions was. What did he answer? Help
*January 21, 2015 by Shane*

**Partial Fractions**

I think- and this is just out loud- that you would do (Cx + D) Over the X^2 + 2? Am I getting that right? OR You have Cx + D over something if the SOMETHING has a term of X to a power greater than one? Am I right?
*February 25, 2008 by Sean*

**Calculus ll**

Find the partial derivative of the function with respect to each of the independent variables.f(x,y)=xe^2y
*June 7, 2011 by Chris*

**Calculus - HELP plz!**

Find all of the first partial derivatives of f(x,y,z)=arctan y/xz
*June 2, 2013 by Sara*

**math**

: Fractions are an important part of your daily lives. Describe some practical applications for fractions in your daily life and some challenges that you have experienced regarding the use of fractions.
*May 18, 2010 by ree*

**Maths: Partial Differentiation**

1) If x = rcos theta and y = r sin theta, show that partial r / partial x = cos theta and find partial theta / partial x. 2) If z = sin theta.sin phi.sin gamma, and z is calculated for the values theta = 30degrees, phi = 45 degrees and gamma = 60degrees, find approximately the...
*January 9, 2010 by Claire*

**Inverse laplace**

Given F(s) = 1/((s-1)^(2)(s+1)) After using partial fractions, I got (1/4)[(2/((s-1)^(2)))+(1/(s+1))-(1/(s-1))] before applying Laplace inverse. Apparently, the answer is (1/4)[2te^(t) + e^(-t) - e^(t)], however I don't know where the t in 2te^(t) came from. Can someone please...
*March 6, 2014 by Student*

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