CAPE Pure Mathematics Unit 1 · May/June 2012 · Paper 1 · Question Q33

\frac{d}{dr}(\pi r^2) is equal to

1. (A)\lim_{h \to 0} \frac{\pi(r + h)^2 - \pi r^2}{h}
2. (B)\lim_{h \to 0} \frac{(\pi r + h)^2 - \pi r^2}{h}
3. (C)\lim_{h \to 0} \frac{\pi(r - h)^2 - \pi r^2}{h}
4. (D)\lim_{h \to 0} \frac{\pi r^2 - \pi(r + \pi r^2)}{h}