Friday

January 30, 2015

January 30, 2015

Posted by **allison** on Wednesday, October 8, 2008 at 6:38pm.

and integrate

x/x^2 dx

it might be simple...i just need a head start...tnx

- integrate -
**allison**, Wednesday, October 8, 2008 at 6:39pmdo i use the subsitution rule?

- integrate -
**allison**, Wednesday, October 8, 2008 at 6:44pmto be more specific...i know its best for me to attempt the problem

so for the first problem i used substitution as

v=3u

dv=3du

du=dv/3

so answer i got was 1/3 ln3u

is that correct?

and on the second on i tried

x*x^-2 as x^-3 dx so

ans is -1/2x^-2

is that correct? please let me know before i go ahead...i have a test tommorow and i am trying to do as many practice problem as i can...tnx

- integrate -
- integrate -
**Damon**, Wednesday, October 8, 2008 at 8:21pmdu/3u = (1/3) du/u

which is (1/3)[ ln u + ln constant ]

--> (1/3) ln ( c u)

c = 3 works

so

(1/3) ln 3u + constant

x/x^2 = 1/ x

so

dx/x --> ln x + constant

I think x^1*x^-2 = x^-1 = 1/x

**Answer this Question**

**Related Questions**

Integral calculus - Please do help solve the followings 1) Integrate e^4 dx 2) ...

calculus - 1) Integrate Cos^n(x) dx 2) Integrate e^(ax)Sinbx dx 3) Integrate (...

Calc 1 - integrate from 0 to pi/4 (sec^2x)/((1+7tanx)^2)^1/3 integrate form pi^2...

Calculus - 6.] Replace the integral in exercise 5 (int. (1/ 1 – t) dt a = 0, b...

calculus 2 - Justify, with a written explanation or a mathematical reasoning ...

calculus help please - dy/dx = 2y^2 Integrating...y=2/3 y^3 + C put 1,-1 into ...

Math Integration - Integrate: f (x)/(2x + 1) dx let f represent integrate sign ...

Calculus AB - Please help me integrate this equation using partial fractions: ...

Calculus - How do you integrate [(x^2)(cos(2(x^3)))]? I tried to integrate by ...

math - Find the area bounded by the parabola y^2=4x and the line y=2x-4. Use ...