Results 1 to 4 of 4

Math Help - simple integral

  1. #1
    Newbie
    Joined
    Jan 2008
    Posts
    2

    Exclamation simple integral

    Ive totally forgot how to integrate and need help with integrating
    3x^2-2 / x with steps shown please my exams on friday and im brickin it
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Math Engineering Student
    Krizalid's Avatar
    Joined
    Mar 2007
    From
    Santiago, Chile
    Posts
    3,654
    Thanks
    13
    \int {\frac{{3x^2  - 2}}<br />
{x}\,dx}  = \int {3x\,dx}  - 2\int {\frac{1}<br />
{x}\,dx} .

    Does that make sense?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jan 2008
    Posts
    2
    Quote Originally Posted by Krizalid View Post
    \int {\frac{{3x^2  - 2}}<br />
{x}\,dx}  = \int {3x\,dx}  - 2\int {\frac{1}<br />
{x}\,dx} .

    Does that make sense?
    some does, but i dont understand where the 2 over x goes?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by jackman View Post
    some does, but i dont understand where the 2 over x goes?
    did you mean \int \frac {3x^2 - 2}x~dx or \int \left( 3x^2 - \frac 2x \right)~dx ?

    Krizalid changed \int \frac 2x~dx to 2 \int \frac 1x~dx. which is valid. you should know this
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. A simple integral
    Posted in the Calculus Forum
    Replies: 5
    Last Post: August 9th 2010, 08:30 AM
  2. simple integral
    Posted in the Calculus Forum
    Replies: 5
    Last Post: August 4th 2010, 09:09 PM
  3. Simple Integral Question (I think it's simple)
    Posted in the Calculus Forum
    Replies: 7
    Last Post: February 13th 2010, 02:37 PM
  4. Help with simple (i think...) integral
    Posted in the Calculus Forum
    Replies: 5
    Last Post: October 15th 2008, 06:33 PM
  5. Simple integral
    Posted in the Calculus Forum
    Replies: 7
    Last Post: March 23rd 2007, 07:37 PM

Search Tags


/mathhelpforum @mathhelpforum