Thursday

August 28, 2014

August 28, 2014

Number of results: 440

**Integral calculus**

Please do help solve the followings 1) Integrate e^4 dx 2) Integrate dx/sqrt(90^2-4x^2) 3) Integrate (e^x+x)^2(e^x+1) dx 4) Integrate xe^x2 dx e^4 is a constant. 3) let u= e^x + x du= (e^x + 1)dx 4) let u= x du=dx v= e^x dv= e^x dx
*April 13, 2007 by Febby-1*

**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 integrate sin(yx) ...
*April 13, 2007 by Febby*

**Calc 1**

integrate from 0 to pi/4 (sec^2x)/((1+7tanx)^2)^1/3 integrate form pi^2/36 to pi^2/4 (cos(x^1/2))/(xsin(x^1/2))^1/2 integrate from 0 to pi/3 (tanx)/(2secx)^1/2
*November 30, 2012 by Frank*

**integrate**

integrate du/3u and integrate x/x^2 dx it might be simple...i just need a head start...tnx
*October 8, 2008 by allison*

**Calculus**

6.] Replace the integral in exercise 5 (int. (1/ 1 t) dt a = 0, b = 1/2with ?1/(1+t) dt with a = 0, b = 1, and repeat the four steps. a. integrate using a graphing utility b. integrate exactly c. integrate by replacing the integrand with a Taylor series and integrate term by...
*October 16, 2011 by Rajeev*

**calculus 2 **

Justify, with a written explanation or a mathematical reasoning and with a sketch of at least two different cases, the following properties of integrals: a) If f(x) is less than or equal to g(x) for a<=x<=b then integrate from a to b of f(x)dx is less than or equal to ...
*September 12, 2012 by bobby*

**calculus help please**

dy/dx = 2y^2 Integrating...y=2/3 y^3 + C put 1,-1 into the equation, and solve for C. Then find the y for x=2 if y= a^uhttp://math2.org/math/integrals/tableof.htm see exponential functions. dy/dx=2y^2 and if y=-1 when x=1, then when x=2, y=? how do i get x in the equation. do ...
*December 10, 2006 by bobpursley*

**Math Integration**

Integrate: f (x)/(2x + 1) dx let f represent integrate sign let u = x, du = dx => dx = du = f (u)/(2u + 1) du = f u (2u + 1)^(-1) du = (1/2)u^2 (ln|2u + 1|) + c = (1/2)x^2 (ln|2x + 1|) + c ...what did I do wrong? The correct answer is (1/2)x - (1/4)ln|2x + 1| + c
*February 11, 2009 by Anonymous*

**Calculus**

How do you integrate [(x^2)(cos(2(x^3)))]? I tried to integrate by parts but I'm going in circles yet again...
*February 13, 2009 by Hannah*

**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*

**plz integrate**

how do u integrate 1+u/3u+2u^2 please help me get started ...tnk u
*October 8, 2008 by allison*

**MATHS...PLEASE HELP**

what do you get when you: integrate 10sin^4xcosx dx when you integrate 9x^2e^6x^3 dx
*September 12, 2010 by adil ahmed*

**Integral calculus**

Please can anyone help with the following problems - thanks. 1) Integrate X^4 e^x dx 2) Integrate Cos^5(x) dx 3) Integrate Cos^n(x) dx 4) Integrate e^(ax)Sinbx dx 5) Integrate 5xCos3x dx The standard way to solve most of these integrals is using partial integration. So, look ...
*April 13, 2007 by Febby*

**PLZ integrate**

integrate cos^3x dx tnk U
*November 19, 2008 by mary*

**maths**

integrate by parts integrate (4+x^2)^1/2
*December 29, 2012 by laura*

**maths**

integrate by parts integrate (4+x^2)^1/2
*December 29, 2012 by Jess*

**calculus**

1) Integrate (e^x+x)^2(e^x+1) dx 2) Integrate xe^x2 dx Let u=(e^x+x) du=(e^x +1) dx I will be happy to critique your work or thinking. You are posting work for me to do, and I am not inclined to do that, it will not help you for me to do it. I think I gave you strong hints on ...
*April 13, 2007 by Febby*

**integrate**

how do i integrate 2u du /u-2+2u^2 so i used subsitution rule? or can i used integration by parts and how? thanks in adnvace
*October 8, 2008 by allison*

**math, calculus 2 **

Consider the area between the graphs x+y=16 and x+4= (y^2). This area can be computed in two different ways using integrals. First of all it can be computed as a sum of two integrals integrate from a to b of f(x)dx + integrate from b to c of g(x)dx What is the value of a, b, c...
*September 12, 2012 by bobby*

**calculus**

Integrate sqrt(x^2 + 1) dx over [0,2*pi] I can substitute u=arctan x to get: Integrate (sec u)^3 du over [0,arctan(2*pi)] From there, I'm stuck. (thanks Count Iblis for your last help)
*July 6, 2012 by Parker*

**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*

**calcus**

Sketch the regions enclosed by the given curves. Decide whether to integrate with respect to x or y. Draw a typical approximating rectangle and label its height and width. integrate with either respect to x or y, then find area S of the region given that y=sqrt(x), y=x/2, and ...
*October 21, 2010 by helpplease*

**Calculus**

Sketch the regions enclosed by the given curves. Decide whether to integrate with respect to x or y. Draw a typical approximating rectangle and label its height and width. integrate with either respect to x or y, then find area S of the region given that y=sqrt(x), y=x/2, and ...
*October 21, 2010 by saywhat*

**Calc**

Calculate the area bounded by the x-axis and the function f(x)= -(x-a)(x-b), where a<b and a and b are constants. Please do it out in steps so I can understand it, and try to simplify the final answer and leave it in factored form. Frankly, I would multiply out the ...
*November 27, 2006 by Tezuka*

**math**

Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area of the region. 2y=5x , y=3 and 2y+1x=6 It is easier to integrate with respect to the variable Area = Help!!!!
*January 25, 2014 by kitor*

**math**

Find the area bounded by the parabola y^2=4x and the line y=2x-4. Use vertical representative rectangles (integrate with respect to x) and horizontal representative rectangles (integrate with respect to y). the answer is 9 square units ... i just need to know how to get to that.
*December 15, 2010 by ashton*

**College Calc 1**

Find the area bounded by the parabola y^2=4x and the line y=2x-4. Use vertical representative rectangles (integrate with respect to x) and horizontal representative rectangles (integrate with respect to y). the answer is 9 square units ... i just need to know how to get to that.
*December 15, 2010 by Ashton*

**Calc**

Problems, once again. 1. Compute the average value of: f(x} = x/(x+3) over the interval [-a,a] 2. Find the area of the region bounded by the graph of: y = 2√(x^2 + 1) X axis Y axis Line x = 1 On the first, integrate, then divide the integral by 2a. On the second, ...
*March 17, 2007 by Tezuka*

**Calculus**

dy/dx = 4ye^(5x) a) Separate the differential equation, then integrate both sides. b) Write the general solution as a function y(x). For the second part, I got y(x)=e^((5e^(5x))/(5)) + C but I don't understand how to separate differential equations and/or integrate both sides...
*June 16, 2014 by Jamie*

**Math**

dz =(−sinx + 2xy^2)dx +(2x^2 y)dy Integrate the differential to find the function z. Would I say that z was equal to two separate differentials and integrate the first part of the function with respect to x and the second part with respect to y? z = cosx + x^2 y^2 + x^2 ...
*May 17, 2009 by Clare*

**Calculus**

integrate t*(t^2 - 1)^(1/3) dt over (0,3) I substitute u = t^2 - 1 du = 2t dt which leads to integrate (1/2) u^(1/3) du over(-1,8) = (3/8) * u^(4/3) over (-1/8) = 3/8 * [8^(4/3) - (-1)^(4/3)] I would guess that (-1)^(4/3) is +1, since the cube root of -1 is -1 and taking that...
*February 5, 2011 by Sean*

**Calculus HELP plz**

Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area of the region. 2y=4x^1/2,y=5,2y+1x=5 Do you really mean "2y+1x=5" ? It is not customary to use the coefficient 1 in front of a variable. It is unnecessary. ...
*May 5, 2007 by jimmy*

**Integrating Factors**

I've been working on this hw problem for a while now, but I'm stuck in the integration process. I'm pretty sure I made an error, cause I can't seem to be able to integrate the right side of the equation. Q: (1/(x^(2)+1))y' + xy = 3 using the equation d/dx(ry)=f(x)r(x) I found ...
*January 20, 2014 by Student*

**calculus-integration**

integrate -2/xln^4(x)...plz help me..give me an idea on how to start..plz The derivative of the ln(x) function is 1/x and this is multiplying the ln^4(x). You can thus write the integral as: -2 * 1/5 ln^5(x) + constant. is that the answer? wut about the x infront of ln^(x)......
*May 7, 2007 by Maria*

**math, calculus 2 **

Consider the function f(x)=-((x^2)/2)-9. In this problem you will calculate integrate from 0 to 3 of ((-x^2)/2)-9)dx by using the definition integrate from a to b of (f(x))dx= lim as n approaches infinity of sum_(i=1)^n of (f(x_i))(delta x) The summation inside the brackets is...
*August 29, 2012 by bobby*

**Integration of exponents with absolute values**

I cannot for the life of me figure this out. Please help me. How do I integrate the function f(x) = 0.1 * e ^ (-0.2 * |x|) from neg. Infinity to pos. Infinity? I seem to only be able to get 0, but the answer is 1. I think it is the |x| that is throwing me off. Please Hlep! ...
*January 24, 2007 by Tyler*

**Calculus**

Calc length of arc of y=ln(x) from x=1 to x=2 ---- So far: Definite Integral over x=(1,2) of sqrt(1 + 1/x) dx 1/x = tan^2 t x = 1/tan^2 t sqrt(1+1/x) = sqrt(1+tan^2 t) = sec t dx = -2 * tan^-3 t * sec^2 t dt Integrate over x=(1,2): sec^3 t / tan^3 t dt Integrate over x=(1,2): ...
*January 2, 2008 by mathstudent*

**physics (mechanics)**

Practice problem: A rocket sled for testing equipment under large accelerations starts at rest and accelerates according to the expression: a= (2.8 m/s^3)t + (3.9 m/s^2) How far does the rocket move in the time interval t=0 to t=0.81 s? This is just a practice problem to help ...
*August 28, 2010 by John*

**calculus-integration!**

should i use substitution?? if yes how should should i use it? plz i need some directions? k plz someone?...so far i used trig. substitution. i got a=8, so i used x=asin()so according to this substitution i got x=8sin() and dx=8cos() d...then i used used the plug them in ...
*May 6, 2007 by Maria*

**Calculus**

Integrate: x/(9+x^4)dx
*January 22, 2013 by Bella*

**Calculus**

integrate: (x^2 + 1)^k dx
*November 6, 2007 by mathstudent*

**math**

integrate: (x^2 + 1)^k dx
*November 7, 2007 by mathstudent*

**calculus**

Integrate: dx/(2x^2 + 4x + 7)
*January 6, 2008 by mathstudent*

**calculus**

how do you integrate x^2/(9+x^6)
*February 12, 2008 by sarah*

**calculus**

how do you integrate x^2/(9+x^6)
*February 12, 2008 by sarah*

**math**

how do you integrate dx/(x^2*(x^2+4)^1/2)?
*February 15, 2009 by Lauren*

**math**

how do you integrate (3x+1)/(x-1)x^2 dx?
*February 15, 2009 by Laura*

**calculus**

how do you integrate dx/(x^2*(x^2+4)^1/2)
*February 16, 2009 by Lauren*

**Calc**

how do I integrate x^4-3y^3+2y^2? thanks
*November 21, 2009 by Rose*

**calculus**

integrate (2/3x^5)
*January 28, 2010 by Anonymous*

**Calculus**

From 2 to 3, integrate ((x^3)+5)dx/x.
*February 5, 2010 by <3*

**calculus**

integrate 2/((2x-7)^2) from x=4 to 6
*June 24, 2011 by cyn*

**Calc**

Integrate from [0, 1/2]: 1/(4x^2+1)^(3/2) dx
*February 23, 2012 by Anonymous*

**Calculus**

Integrate (x^3)/((x^2)+4) dx
*December 17, 2012 by Athlete 34*

**Calculus**

integrate x^2+4x+12/(x-2)(x^2+4)
*December 19, 2012 by Anonymous*

**maths**

integrate x^2/(x^4+a^4) dx
*December 21, 2012 by sapna*

**maths**

integrate 2^(3x). 3^(2x) . 5^(x) dx
*December 22, 2012 by Anonymous*

**Calculus**

How do you integrate: 1/(x^2-1) dx ?
*January 9, 2013 by Kyle*

**calc**

Integrate 2(x^2)e^g(x) where g(x)=4^(x^3)
*May 1, 2013 by Sunny*

**math**

integrate (x^2 + 2x + 5) / (x - 2)
*May 8, 2013 by sunny*

**math**

how do you integrate 3-e^1?
*February 8, 2014 by Hannah*

**Math**

Integrate (5x^2 + 3x - 2)/(x^3 + 2x^2)
*April 12, 2014 by Anonymous*

**math**

Integrate: y/sqrt(2y+1) dx
*September 15, 2007 by mathstudent*

**math**

Integrate: csc x dx
*December 17, 2007 by mathstudent*

**Calculus**

How do we integrate xlne^x .
*March 18, 2008 by RJ*

**Calculus**

How do we integrate 1/lnx.
*March 18, 2008 by RJ*

**college math**

how do you integrate ln(x^2+1)dx?
*February 15, 2009 by Laura*

**calculus**

how do you integrate 30x^2/(x-2)(x+3)(x-5)
*February 16, 2009 by Lauren*

**calculus**

how do you integrate 30x^2/(x-2)(x+3)(x-5)
*February 17, 2009 by Lauren*

**calculus**

How do I integrate 1-e^-kt from 0 to infinity?
*March 2, 2010 by will*

**Calc II**

Integrate 3/(Sqrt x^2-16) dx
*June 26, 2010 by Scott*

**calculus**

How do I integrate [1/(x^2+1)] Thx
*January 25, 2011 by Priscilla*

**calculus**

integrate x+5/(x^2+10x+26)
*January 26, 2011 by Anonymous*

**Calc**

How do you integrate sinx?
*February 2, 2011 by Erica*

**calculus**

integrate xsin(2x)dx=
*March 6, 2011 by bob*

**AP Calculus**

integrate |sint(t^2)| dt with 0<t<3
*April 6, 2011 by Sandy*

**calculus**

how to integrate surd (1+4x^2)?
*April 27, 2011 by awoz*

**Calculus**

How would you integrate x^2/x^2+9 ?
*May 26, 2011 by Athene*

**Integration by parts**

integrate (e^x-x)^2 dx
*July 13, 2011 by Steff*

**Calculus**

How do you integrate 3∫(1)/(x+1) dx ? Thank you!
*October 19, 2011 by Erica*

**Calculus**

integrate: (x^2-3)sqrt (x+5)
*December 14, 2011 by Ashley*

**Calculus**

Integrate tan^6(x)
*January 8, 2012 by Shayna*

**Calculus**

Integrate the following (x^5 - 2)dx
*February 10, 2012 by Taylor*

**math**

Integrate x^2/rootx-1..
*October 5, 2012 by abhi*

**calculus**

integrate the following (3y-7x-3)dx+(7y-3x-7)dy=0
*January 3, 2013 by waqas*

**maths**

integrate sqrt2/1-3x
*February 26, 2013 by Anonymous*

**maths**

integrate 10*e^5t*cos5t.
*May 25, 2014 by Abhi*

**college calculus**

how do you integrate sqrt( x^2 - (x^2)(e^(-2x)) )?
*March 11, 2008 by matt*

**maths calculus**

How to integrate (cos2x)^2?
*October 17, 2008 by Surf*

**calculus**

integrate: square root of (4-x^2)
*December 2, 2008 by Jenny*

**math/ cal**

how do you integrate sin (x^2) dx?
*February 15, 2009 by Laura*

**college math**

how should I integrate 1/(x^2 +1)^5
*February 15, 2009 by Ann*

**college math**

how do you integrate (cos^2 x)^4
*February 15, 2009 by Laura*

**integration math**

how to integrate: y' = 2xy/(x^2-y^2)
*April 13, 2009 by stevie*

**calc**

Integrate (1/2)^(3x+2)dx using substitution.
*December 6, 2009 by Carly*

**Maths**

How do I integrate this: x cubed + 1 --- x to the power of -3
*December 30, 2009 by Dakota*

**Math**

What substitution could I use to integrate a/(a^2 + x^2)^3/2 dx
*January 26, 2010 by Sean*

**calculus**

Integrate x^2+5x+1dx/(2x^3+15x^2+6x+23)^1/2
*October 15, 2010 by Frank*

**Caculus**

integrate x^(1/2)e^x.dx from 0 to 4, n=12 1) the trapezoidal rule
*November 24, 2010 by chen*

**calculus **

integrate: (square root of (6x+4)) - (2x) dx
*December 27, 2010 by joe*

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