CAPE Pure Mathematics Unit 2 · May/June 2018 · Paper 1 · Question Q10
\int \frac{1}{1 + 9x^2}\,dx is
- (A)
\frac{1}{9}\tan^{-1}x + c - (B)
\frac{1}{3}\tan^{-1}3x + c - (C)
\frac{1}{3}\tan^{-1}\frac{x}{3} + c - (D)
\frac{1}{9}\tan^{-1}3x + c
The answer is shown once you've answered.
Practise this question