Integrate the functions in Exe2x – InterviewSolution

1.

Integrate the functions in Exe2x

Answer»

∫ 2x/(1 + x²) dx ....(1)

Let 1 + x² = t

2xdx = dt

∫ 1/t dt

log (t) + C

put t = 1 + x²

log ( 1 + x²)

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