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Evaluate the integral (4x)/(x2 +1)dx.?

2007-09-30 13:37:43 · 2 answers · asked by markusa_j 1 in Science & Mathematics ➔ Mathematics

2 answers

Evaluate the integral (4x)/(x2 +1)dx.

let u=x^2+1
du=2x dx

answer:
2In(x^2+1) +C

2007-09-30 13:45:25 · answer #1 · answered by ptolemy862000 4 · 0⤊ 0⤋

Int = 2 ln ( x^2+1)+C

2007-09-30 13:40:54 · answer #2 · answered by santmann2002 7 · 0⤊ 0⤋

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