166 Answered Questions for the topic Integration

Integration

10/28/14

#### How do i know which part of the function i should integrate and which one to derivate when doing integration by parts?

As in, which one should i label as f(x) and which is g(x)? How should i think when i see a problem given?
Integration Math Help

09/18/14

#### How do you integrate 1/(x^2 + 25)^2?

I've been stuck on this question for a while. I've tried integration by parts but that doesn't help so I thought substitution would help but I don't know what to substitute it for.
Integration Calculus U Substitution

09/08/14

#### integrate using "reversed" substitution

Using the substitution x=(√3)tany find the exact value of1∫3 1/√(3+x^2) dxexpressing your answer as a single logarithm in terms of y
Integration

08/21/14

#### Integrate x/(x^2-5x+25)

When I substitute u=x^2-5x+25 I get du=2x-5 dx. That gets me close to x dx. I would normally just pull out 1/2, but I'm confused how to deal with the -5.  it looks like I should get a ln portion... more
Integration Calculus Pre Calculus

04/30/14

#### A curve is such that dy/dx= 6/x^2 and (2,9) is a point on the curve. Find the equation of the curve.

The slope of the curve has to be found by the dy/dx= 6/x^2. It will most likely end up as a y-y1=m(x-x1) formula at the end.
Integration Volume By Integration

04/26/14

#### find the volume of the solid formed by rotating the region enclosed by x=0, x=1, y=0, y=9+x^7 about the y axis

find the volume of the solid formed by rotating the region enclosed by x=0, x=1, y=0, y=9+x^7 about the y axis
Integration

04/11/14

∫(secθ⁄cosθ) dθ

03/02/14

#### Let f(x) = integral from (-2) to (x^2-3x) of e^(t^2) dt. At what value of x is f(x) a minimum?

At what value of x is f(x) a minimum?   I know f'(x) = e^((x^2-3x)^2) , but I don't know how to continue.   Thanks!
Integration

01/15/14

#### integral of dx/root of c-k/x

∫dx/(c-k/x)1/2
Integration Calculus

11/24/13

#### Find the interest earned on an interest-bearing account

Every month, a particular interest-bearing account earns 0.2 percent interest on the average balance for that month. The function B(t) =7.5t^2 -300t +5000 represents one investor's balance in this... more
Integration Integral

10/31/13

#### Why is the derivative of the answer to an integral equal to the primary function which we want to take integral of? I'm looking for the concept.

Integration Calculus Integral

10/16/13

#### Integration

∫√(4x2+40x)dx
Integration Calculus Substitution

09/15/13

∫cos4 θ sin θ dθ
Integration

04/12/13

#### int(sec(x)+tan(x))dx

find integration by subtutitions.
Integration Calculus Integrals

03/23/13

#### How do you find the equation to an integral when the equation is not given but the answer to the integral is?

int; integral sign Find int (bottom: -3 top: -5.5) (8*f(x)-9)dx when int (bottom:-5.5 top:-3) f(x)dx = -2 Also; let int (bottom: -8 top: -0.5) f(x)dx =8 int (bottom: -8 top: -5.5) f(x)dx =... more

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