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7. Let h(x) = 1 (x+2)= Define two functions f(x) and g(x), where h(x) = f(g(x)) 1. Solve for x, where O S x S 2n. vvVV 2 cos' x - =cos x - = = 0 2. A photographer uses a light meter to measure the intensity of light from a flash bulb. The intensity for the flash bulb, I, measured in lux, is a function of the distance from the light, d, measured in metres, and can be represented by led) - a) Determine the following, to two decimal places. i) the average rate of change in the intensity of light for the interval [2, 5] ii) the approximate instantaneous rate of change in the intensity of light at exactly 6 m from the flash bulb. b) What does the sign of your answer to part a), subpart ii), indicate about the light intensity