integral
posted by matrix school 2 .
find the following integral
dx/(25+(x5)^2)
yes this.

integral 
Marth
The integral(u' / (a^2  u^2)) = 1/a(atan(u/a)) +C
let u = x5
du = dx
and let a = 5
So the answer is 1/5 (atan((x5)/5)) +C
Note: atan = arctangent
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