A model for the height, hhh metres, of a fast-growing bamboo pole ttt weeks after it is planted is given by h=1.2+4ln(2t+1)h = 1.2 + 4 \ln(2t + 1)h=1.2+4ln(2t+1), for t≥0t \ge 0t≥0. Determine the exact rate of growth of the bamboo pole, in metres per week, at the instant when the height of the pole is 9.29.29.2 metres.
333 exam-style questions on WJEC A Level Maths 3.6 Differentiation (A-level only), covering 3.6.1 Differentiation (A-level only), 3.6.2 Differentiation (A-level only), 3.6.3 Differentiation (A-level only), 3.6.4 Differentiation (A-level only), 3.6.5 Differentiation (A-level only), 3.6.6 Differentiation (A-level only), 3.6.7 Differentiation (A-level only), and 3.6 Differentiation (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.