
Which is correct ?
Hi.
(Let, Int=integral and Sqrt=square root and In=natural log)
In a math book I found that
Int( Sqrt(Z^2A^2) )
= (A^2)/2 * ( (Z*Sqrt(Z^2A^2))/(A^2)  In((Z+sqrt(z^2A^2))/A) )
= (Z*Sqrt(Z^2A^2))/2  ( (A^2)/2 * In((Z+sqrt(z^2A^2))/A) )
but with my TI89 titanium calculator the same integral gave
Int( Sqrt(Z^2A^2) )
= (Z*Sqrt(Z^2A^2))/2  ( (A^2)/2 * In(Z+sqrt(z^2A^2)) )
After some working out on paper, I found my calculator gave the wrong result. I not too sure why this is. Can anyone tell me which is correct ?
Thanks

Which variable is this respect to?
is much different from
Jameson

You can check an alleged indefinite integral (antiderivative) by differentiating ...

ah... sorry, it's with repect to z.
thanks
