Mathematics (AS & A Level) · Oct / Nov 2022 · Paper 31 · Question 8
9709
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In a certain chemical reaction the amount, x grams, of a substance is increasing. The differential equation satisfied by x and t, the time in seconds since the reaction began, is dx dt = kxe−0.1t, where k is a positive constant. It is given that x = 20 at the start of the reaction.
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8(a)[5]
8(b)[3]
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