(a)Use Tables, or otherwise, to evaluate log4 e’cos 3xdr. Simplify your answer. (b)Use u-substitution to evaluate1-xe dx. (e)Determine the value of a >0 such that1√a2-9x dr3(d)(i) very simple model for quarantine-lim- Covid–19 spread in city says that the rate of spread of the disease is proportional to the product of th number of persons infected and the number of persons available to be. but yet to be, infected. Let the total population of the city be P persons and let N be the number infected at time t. We assume that quarantine results in a limited number L of persons who have any possibility of being exposed to infection, where L<

**题目答案请扫描下方二维码查看。**