Engineering Board Exam Reviewer · Indefinite Integrals - Basic Formulas · medium

Evaluate: 2x/x2+1,dx

1. (x2+1)+C
2. 12 (x2+1)+C
3. x+C
4. 2 (x2+1)+C

Answer

A. (x2+1)+C

Solution

Let u=x2+1, du=2x,dx. /u= (x2+1)+C.

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