Hi everyone,
Can you please tell me if this is correct and if it isn't can you give me a hint or explain to me why it is wrong?
Evaluate the following integrals:
X/(X^2+1)^2dx
u=x^2+1
du+2xdx
xdx=du/2
x/(x^2+1)^2dx=
1/u^2du/2=
1/lnu^2+c=
1/2ln(x^2+1)^2
Thank you very much
P.S.
Does anyone know how to add math symbols on the computor? that is, how to add a square root, x squared etc.
You started off nicely, then it went horribly wrong ... well, not horribly, i'm exagerated, i can see how you made that mistake
doing what you did:
We proceed by substitution:
Let
So our integral becomes:
THIS IS WHERE YOU MADE THE MISTAKE, THIS INTEGRAL DOES NOT GIVE
.........now use the power rule
do you know how to use LaTex? see the LaTex Tutorial on this site
P.S.
Does anyone know how to add math symbols on the computor? that is, how to add a square root, x squared etc.
otherwise, to say "the square root of x" you would type "sqrt(x)"