Evaluate ∫ 3x/√(x² + 1) dx

University of Ilorin MTH102 2026-exam past question

1. 3√(x² + 1) + C
2. (3/2)√(x² + 1) + C
3. 3x²/√(x² + 1) + C
4. 6√(x² + 1) + C

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