A Level

MATHEMATICS · Single correct · A Level · Mathematics · Integration · Integration

Problem

Evaluate ∫dx(x−2)2+9\displaystyle \int \frac{dx}{(x-2)^2 + 9}. (a) 13tan⁡−1x3+C\dfrac{1}{3}\tan^{-1}\dfrac{x}{3} + C (b) 13tan⁡−1x−23+C\dfrac{1}{3}\tan^{-1}\dfrac{x-2}{3} + C (c) 13tan⁡−1x−29+C\dfrac{1}{3}\tan^{-1}\dfrac{x-2}{9} + C (d) tan⁡−1x−23+C\tan^{-1}\dfrac{x-2}{3} + C

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