Results 1 to 4 of 4

Math Help - intergration

  1. #1
    Newbie
    Joined
    Aug 2006
    Posts
    24

    intergration

    I am not sure if I am integrating this correctly. The constant in the numerator is throwing me off a bit.

    integrate 3/(2x+5)dx

    =3(1/x^2+5x+C)
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Global Moderator

    Joined
    Nov 2005
    From
    New York City
    Posts
    10,616
    Thanks
    9
    Quote Originally Posted by startingover View Post
    I am not sure if I am integrating this correctly. The constant in the numerator is throwing me off a bit.

    integrate 3/(2x+5)dx
    Hint: \int \frac{3}{2x+5} = 3\int \frac{1}{2x+5} dx
    Follow Math Help Forum on Facebook and Google+

  3. #3
    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 startingover View Post
    I am not sure if I am integrating this correctly. The constant in the numerator is throwing me off a bit.

    integrate 3/(2x+5)dx

    =3(1/x^2+5x+C)
    \int \frac {3}{2x + 5}dx = 3 \int \frac{1}{2x + 5} dx

    Now use substitution, u = 2x + 5

    Can you take it from here?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Math Engineering Student
    Krizalid's Avatar
    Joined
    Mar 2007
    From
    Santiago, Chile
    Posts
    3,654
    Thanks
    12
    Quote Originally Posted by startingover View Post
    integrate 3/(2x+5)dx
    \int\frac3{2x+5}~dx=3\int\frac1{2x+5}~dx=\frac32\i  nt\frac{(2x+5)'}{2x+5}~dx=\frac32\ln\left|2x+5\rig  ht|+k
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Intergration
    Posted in the Calculus Forum
    Replies: 1
    Last Post: April 23rd 2011, 06:14 PM
  2. Intergration
    Posted in the Calculus Forum
    Replies: 1
    Last Post: November 9th 2008, 01:46 PM
  3. Intergration help!!!!!!
    Posted in the Calculus Forum
    Replies: 1
    Last Post: October 28th 2008, 06:41 AM
  4. help with intergration please
    Posted in the Calculus Forum
    Replies: 1
    Last Post: October 14th 2008, 06:10 PM
  5. Intergration
    Posted in the Calculus Forum
    Replies: 1
    Last Post: August 16th 2008, 10:33 PM

Search Tags


/mathhelpforum @mathhelpforum