Sunday

July 5, 2015

July 5, 2015

Number of results: 17,165

**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 Help**

Directions: Decide whether the statements are true or false by using partial fraction decomposition. If the statement is false, show the correct way to decompose the partial fraction. 3/x^2+x-2=-1/x+2+1/x-1
*March 19, 2015 by Alexander*

**function ( partial fraction)**

if f(x) ax^2+bx+c , g(x) :1/3x^2+2 and fg(x)= 18x^4+24x^2+11/(3x^2+2)^2. find a ,b and c
*December 17, 2011 by kingwendu*

**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*

**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*

**calculus**

Write the form of the partial fraction decomposition of the function do not determine the numerical values of the coefficients. 1/x^4-2401
*July 28, 2013 by April*

**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*

**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*

**physics**

Part (a) of the figure below is a partial graph of the position function x(t) for a simple harmonic oscillator with an angular frequency of 1.00 rad/s; Part (b) of the figure is a partial graph of the corresponding velocity function v(t). The vertical axis scales are set by xs...
*February 4, 2011 by rock*

**Calc Help Please Again Last one!**

Write out the form of the partial fraction decomposition of the function appearing in the integral: integral (6x-58)/(x^2+2x-63) Determine the numerical values of the coefficients, A and B, where A <= B A=? B=? Thank you guys so much! =)
*May 16, 2014 by Josh *

**Physics**

Figure a is a partial graph of the position function x(t) for a simple harmonic oscillator with an angular frequency of 1.75 rad/s; figure b is a partial graph of the corresponding velocity function v(t). The vertical axis scales are set by xs = 2.50 cm and vs = 2.50 cm/s. ...
*March 16, 2012 by Anna*

**College Chemistry**

A mixture of He and O2 is placed in a 4.00L flask at 32 degrees Celsius. The partial pressure of the He is 2.7 atm and the partial pressure of the O2 is 1.4 atm. What is the mole fraction of O2?? I don't understand how to do this.
*March 9, 2010 by Fernando*

**Chemsitry II**

mole fraction is equal to partial pressure divided by the total pressure Total pressure= sum of partial pressure use PV=nRT where n= number of moles equation become PV/RT=n make sure to convert the temperature to Kelvin and to use 0.0821 for R. V=volume, P=total pressure The ...
*May 10, 2007 by Delli*

**Chemsitry II**

The partial pressure of CH4(g) is 0.185 atm and that of O2(g) is 0.300 atm in a mixture of the two gases. a) What is the mole fraction of each gas in the mixture? b) If the mixture occupies a volume of 11.5 L at 65 degress C, calculate the total number of moles of gas in the ...
*May 10, 2007 by Jayd*

**CHEM HELP**

The partial pressure of water above a solution of water and a nonvolatile solute at 25oC is 19.2 mm Hg. What is the mole fraction of the solute please help....I really don't know how I am supposed to solve this question. I know that Partial pressure of the solvent above a soln...
*February 13, 2009 by jerry*

**Chem **

A gas mixture in a 3.100 L container at 415°C contains 1.30 g each of Ar, CO, and CH4. Find the partial pressure of Ar (in atmospheres). Find the total pressure of the gas mixture (in atmospheres). Find the mole fraction of CO. Do I use PV=nRT for partial pressure and if I do ...
*November 1, 2012 by Anoynmous*

**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*

**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**

Find the equation of the tangent plane at the given point. 1)x^2+y^2-z=1 at the point (1,3,9) 2)x^2*y^2+z-40=0 at x=2, y=3 3) x^2+ln(xy)+z=6 at point (4,0.25,2) For the first one I got the partial fraction in terms of x, y and z and my final answer was -2x+6y-z+2. I don't know...
*October 4, 2012 by Alicia*

**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*

**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*

**Chemistry**

The vapor pressures of ethanol (C2H5OH) and 1-propanol (C3H7OH) are 100 mmHg and 37.6 mmHg, respectively. Assume ideal behavior and calculate the partial pressures of ethanol and 1-propanol at 35 degrees Celsius over a solution of ethanol in 1-propanol, in which the mole ...
*March 18, 2010 by Arnold*

**Chem**

A mixture of He Ne and 3rd gas exhibit a total pressure of 486 mm hg if the partial pressure of He125mm mm hg and partial pressure of Ne is 214mm hg what is the mole fraction of the 3rd gas in container
*April 21, 2013 by Ray*

**Algebra**

Below is my problem with my answers. I don't think this is that tough, but I cannot believe that my ABC answer's are a fraction. Did I do this correctly? Find the unknowns on the right side of the partial fraction. (x+3)/(x^3+64)=(A)/(x+4)+(Bx+C)/(x^2-4x+16) x=0 A= (-x^2B-4xB-...
*April 18, 2008 by Tim*

**Calculus Partial Fraction**

(x^2)/(x^3)(x-2)
*June 28, 2015 by Anonymous*

**Chemistry partial molar volumes**

The partial molar volumes of the CCl4 and benzene are 122cm3/mol and 98.0 cm3/mol, respectively in a solution in which mole fraction of chloroform is 0.2. Calculate the volume occupied by 2.5 moles of the solution. Thank yOu.
*August 24, 2011 by Urgent pls.*

**partial fraction**

if f(x) ax^2+bx+c , g(x) :1/3x^2+2 and fg(x)= 18x^4+24x^2+11/(3x^2+2)^"
*December 16, 2011 by kingwendu*

**CHEMISTRY**

A mixture of methane and helium is placed in a 2.0 l flask at 27 degrees the partial pressure of methane is 0.72 ATM and the partial pressure of helium is 0.22 ATM . What is the mole fraction of ch4?
*July 30, 2014 by MARIA*

**Mathematics**

Is there Anybody can help me on this? Bless you. Express (2x^4-2x^3+x)/((2x-1)^2(x-2)) in partial fraction.
*October 1, 2008 by LingQiWarm*

**Mathematics**

Express (x^6-x^5-4x^2+x)/(x^4+3x^2+2) in partial fraction. Help anybody? Much appreciated.
*October 1, 2008 by LingWarmQi*

**Mathematics**

Express (x^2+23)/((x+1)^3(x-2)) in partial fraction. Thanks very much
*October 1, 2008 by WarmQiLing*

**Math**

Express in partial fraction.7x^2-18x-7 divided by (x-4)(2x^2-6x+3)
*April 10, 2011 by Emma*

**Math**

Express in partial fraction.7x^2-18x-7 divided by (x-4)(2x^2-6x+3)
*April 10, 2011 by Emma*

**Pre-Calculus(Help)**

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

**Physics Phase Constant**

Figure A [[which i tried to recreate below]] is a partial graph of the position function x(t) for a simple harmonic oscillator with an angular frequency of 1.1 rad/s. [a] ............x(cm).............. .................5...
*April 4, 2007 by COFFEE*

**Mathematics**

Anybody know how to do this? I need help ASAP..Express (x^2-x)/((x^2+3)(x^2+2)) in partial fraction. Thanks a lot.
*October 1, 2008 by WarmQiLing*

**math**

how do you integrate 30x^2/((x-2)(x+3)(x-5)) using partial fraction decomposition
*February 15, 2009 by Lauren*

**precalc**

Write the partial fraction decomposition of the rational expression. 6x^2+1/x^2(x-1)^2
*December 4, 2011 by Robert*

**Pre-Calc**

How do I solve this via partial fraction decomposition? (x^2+9)/(x^4-2x^2-8)
*April 12, 2013 by Micki*

**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 *

**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*

**chemistry**

The gases in a mixture have the following partial pressures at the same volume and temperature: 1,013,000 Pa nitrogen, 700 mm argon, 1.20 atm of helium, 790 torr oxygen, and 0.50 atm of carbon dioxide. Rank these gases in order of increasing mole fraction, putting the gas with...
*April 29, 2010 by tete*

**Mathematics**

Express (3x^3+2x^2+2x-3)/((x^2+2)(x+1)^2) in partial fraction. Help any1 plz ASAP. Thanks a million
*October 1, 2008 by QiWarmLing*

**PRE CALC **

please help me solve this partial-fraction decomposition! 12x-57/(x-3)(x-10)
*May 15, 2011 by esora*

**Calculus Partial Fraction**

Sorry. The problem should have been: (x^2)/(x^3-8)(x-2)
*June 28, 2015 by Anonymous*

**precalc/trig**

Write the partial fraction decomposition of the rational expression. 4x^2–19x+31/ (x+2)(x^2–4x+5)
*December 3, 2011 by Robert*

**Math**

Write the partial fraction decomposition of the rational expression. (80-14x)/(x^3 -8x^2 +16x)
*February 16, 2012 by Chelsea*

**Math**

Write out the partial fraction decomposition of the following rational expression. 3x^2-7x-2/x^3-x
*March 9, 2015 by Lele*

**Math**

Write out the partial fraction decomposition of the following rational expression. 1.) 3x^2-7x-2/x^3-x 2.) x^3-x+3/x^2+x-2
*March 10, 2015 by Lele*

**Math**

I need help with this partial fraction problem. Find the indefinite integral of (-5x^3+5x^2-5)/(x^4+X^3). I got -5(log(x+1)+(1/x)-(1/(2x^2)).
*February 15, 2009 by Sandra*

**Precalculus**

Ok u have to put X^3-8 divided over X^2(X-1)^3 Into a partial fraction I need help please
*February 23, 2010 by Sinya*

**math**

write a definition for an equivalent fraction. A. a fraction of multiplication B. fraction with unlike denominators C. a fraction with the value of n D. a fraction thar represents equal amount I put down D.
*July 29, 2012 by Ami*

**algebra**

write the partial fraction decomposition of the rational expression ax over x squared -x-2 or ax ____________ xsquared-x-2
*November 1, 2010 by frank *

**Calculus**

Write the form of the partial fraction decomposition of the rational expression. It is not necessary to solve for the constants: 4x + 1/(x + 6)(x - 5) I came up with A/x + 6 + B/x - 5
*November 28, 2007 by Kelly*

**Trig**

How would you write the partial fraction decomposition of the rational expresion 1/(x^2)-25? I know that you factor the denominator, so that's 1/(x-5)(x+5). What are the next steps?
*May 10, 2011 by JD*

**pre-calculus**

partial fraction; use the rational roots theorem to factor denominator. x^3 + 2 ----------- x^4 +8x^2 +16 i got to that and im stuck Ax+B + Cx+D ---- ----- x^2 +4 x^2 + 4
*March 27, 2013 by jinie*

**Maths**

When the numerator and denominator of a fraction are each increased by 5, the value of the fraction becomes 3/5 When the numerator and denominator of that same fraction are each decreased by 5, the fraction is then 1/5 Find the original fraction. (Hint: Let the fraction be p/q...
*November 13, 2010 by Jannie*

**Math**

Find the partial fraction decomposition for the ration expression. (4x^2 + 9x - 8) / x(x+2)^2 So far, I believe the format is (A/x) + [(Bx+c)/(x+2)^2] ...and I get confused after that. Help plz! Thank you!
*December 29, 2008 by Naoko*

**Chemistry**

A gas mixture contains 1.16 g N2 and 0.89 g O2 in a 1.49 L container at 16 degrees C. What is partial pressure of N2 & O2? *I already know the mole fraction for N2 is 0.60, and 0.40 for O2. I just don't know where to go from here.
*October 11, 2010 by Michelle*

**Calc**

∫ (2x+1)/(x+1) dx Please show steps if you work it. I think it's a partial fraction and worked with decomposition. Not sure though.
*March 14, 2015 by Janice*

**Chemistry**

In a gas mixture of He, Ne, and Ar with a total pressure of 8.40 atm, the mole fraction of Ar is ________ if the partial pressures of He and Ne are 1.50 and 2.00 atm respectively. pHe = 1.50 atm. pNe = 2.00 atm. pAr = 8.40 atm - 1.50 - 2.00 = ?? mole fraction Ar = pAr/total p.
*January 14, 2007 by john*

**Physics Phase Constant**

..im really stuck on this. can someone please explain? ------- Figure A [[which i tried to recreate below]] is a partial graph of the position function x(t) for a simple harmonic oscillator with an angular frequency of 1.1 rad/s. [a].....x(cm)....... ........5...
*April 4, 2007 by COFFEE*

**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**

Could somebody tell me in simple terms why equating coefficients works in partial fraction decomposition? Like a simplified proof or something? I don't understand why.
*June 6, 2011 by Jack*

**math (2)**

Find the first partial derivatives of the function. f(x,y,z) = xe^(y/z) a. fx = ? b. fy = ? c. fz = ?
*April 30, 2014 by Mia*

**math (2)**

Find the first partial derivatives of the function. f(x,y,z) = xe^(y/z) a. fx = ? b. fy = ? c. fz = ?
*May 1, 2014 by Mia*

**Math**

write the partial fraction decomposition step by step (-5x^2-8x-3)/(x^3+x^2+x)
*November 27, 2014 by Jane*

**Math**

write the partial fraction decomposition step by step ((5x-1)/(x^2+4)) - ((4)/(x^2+4)^2)
*November 28, 2014 by Jane*

**fraction**

when a fraction is reduced to its lowest term, it is equal to 3/4. The numerator of the fraction when doubled would be 34 greater than the denominator. Find the fraction.
*August 10, 2014 by Kissi*

**math**

Will someone please show me how to do this problem. I have to write this ratios in simplest form. The ratio of 5 3/5 to 2 1/10. Change each of your mixed fractions to an improper fraction, then divide the first by the second. Remember to divide fraction #1 by fraction #2, you ...
*February 4, 2007 by jeff*

**Math**

The denominator of a fraction exceeds twice the numerator of the fraction by 10. The value of the fraction is 5/12. Find the fraction.
*January 18, 2013 by MP*

**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*

**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*

***math (7)**

Evaluate the first partial derivatives of the function at the given point. f(x, y) = x^2 + xy + y^2 + 2x - y ; at (-5, 4) fx(-5, 4) = ? fy(-5, 4) = ?
*April 29, 2014 by Mia*

**math (3)**

Evaluate the first partial derivatives of the function at the given point.(0,e) f(x,y) = 6e^x ln(y) fx(0,e) = ? fy(0,e) = ?
*April 30, 2014 by Mia*

**Calculus**

find the derivative of y= x^3+8/x+2 the / is meant to be a fraction bar, I am really really bad at finding the derivative of a fraction function, could you help by showing me exactly how, Thanks
*November 9, 2014 by Minnie*

**calculus**

Integral of 10 / (5x^2 - 2x^3) Do not determine the numerical values of the coefficients. Just wanted to know why when I write out the form of the partial fraction decomposition there is A/x + B/x^3 + C/ (x^2 + 4) Why isn't it just A/x^3 + B/ (x^2 + 4)?
*March 2, 2013 by Daniel*

**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*

**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 *

**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*

**CHEMISTRY**

A mixture of Xe, Kr, and Ar has a total pressure of 6.7 atm. What is the mole fraction of Kr if the partial pressures of XE and Ar are 1.6 atm and 2.8 atm? Did anyone get .343 ?
*May 12, 2012 by John*

**Math**

-1/(x^3)-27 or -1=A(x^2+3x+9)+Bx+C(x-3) I'm trying to find the partial fraction decomposition. I think A=-1/21, but how do I find the right values to plug in for x to find B and C?
*December 17, 2012 by Jamie*

**mathematical physics**

Obtain all the first and second order partial derivatives of the function: f( x, y ) = In(I+xy^2)
*March 22, 2015 by gourav *

**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*

**math (7)**

Find the second-order partial derivatives of the function. f(x,y) = x^5 + x^2y + x + 5 a. fxx = ? b. fyy = ? c. fxy = ? d. fyx = ?
*April 30, 2014 by Mia*

**math (8)**

Find the second-order partial derivatives of the function. f(x,y) = x^5 + x^2y^2 + y^4 + x + y a. fxx = ? b. fyy = ? c. fxy = ? d. fyx = ?
*April 30, 2014 by Mia*

**CHM**

A mixture of three gases exert a total pressure of 753 mm Hg.If Gas #1 has a partial pressure of 289 mm Hg and Gas #2 has a partial pressure of 122 mm Hg, what must the partial pressure be of gas #3?
*July 6, 2013 by Anonymous*

**Chemistry**

Consider the following reaction: CO(g)+H2O(g)⇌CO2(g)+H2(g) Kp=0.0611 at 2000 K A reaction mixture initially contains a CO partial pressure of 1348torr and a H2O partial pressure of 1780torr at 2000 K. Calculate the equilibrium partial pressure of CO2. Calculate the ...
*February 25, 2015 by Ryan*

**Chemistry**

A 70.8mL sample of "wet" O2(g) is collected over water at 29.9 degrees Celsius at a barometric pressure of 743 mmHg. The vapour pressure of water at 29.9 degrees Celsius is 31 mmHg. What is the mole fraction of O2 in the gas collected? So i found the partial pressure of O2 to ...
*October 16, 2010 by Jon*

**Chemistry**

The partial pressure of water above a solution of water and a nonvolatile solute at 25oC is 18.6 mm Hg. What is the mole fraction of the solute?
*October 27, 2008 by Jacqueline*

**chemistry**

The mole fraction of nitrogen in air is 0.7808. calculate the partial pressure of N2 in air when the atmospheric pressure is 760 torr?
*November 18, 2011 by NONO*

**Math Problems**

Hi! Someone was helping me with these yesterday but I really didn't get anywhere because I was still confused. So if someone else could help me, that would be great! Thanks! Directions: Write out the partial fraction decomposition of the following rational expression. 1.) 3x^2...
*March 11, 2015 by Gigi*

**Chem**

What is the mole fraction of H2 in a mixture with the total pressure of 800 torr when the partial pressure of H2 is 90 torr?
*June 29, 2011 by Chris*

**calculus**

Just doing example questions to better understand. Find all first and second partial derivatives for the function u= xy^2+x^2y
*April 23, 2012 by Todd*

**Calculus**

Find out the partial derivative w.r.t 'x' and 'y' of f (x,y) = log(y) x Now, log(y) x = ln x / ln y Partial Diff w.r.t 'x' = 1/ x ln y so can you find out what will be the partial derivatives w.r.t 'y'
*March 1, 2015 by Akki*

**Chem**

Consider the reaction: A(g)⇌2B(g) Find the equilibrium partial pressures of A and B for each of the different values of Kp. Assume that the initial partial pressure of B in each case is 1.0 atm and that the initial partial pressure of A is 0.0 atm. Make any appropriate ...
*May 15, 2015 by Chris*