Question: 2 (a) (i) The function)' = x i has a normal line drawn at the point (1, 2). Find the equation of this normal line.

2 (a) (i) The function)' = x i has a normal line drawn at the point (1, 2). Find the equation of this normal line. (2) (ii) For what values of x is the function decreasing? Justify your answer. (2) (b) An unstable gas decomposes such that the amount present (A units) at any time 1: days is given by 11(1): 10005131 (i), 211: g I g 4,: . Find the rate of decomposition after one week. (3)

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