Mathematics (AS & A Level) · Oct / Nov 2025 · Paper 35 · Question 11
9709
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The question as text
A fungal disease is affecting some of the trees in a forest. The fraction of the trees affected after t years is denoted by x. The rate of increase of x is proportional to the product of the fraction of the trees affected and the fraction of the trees not affected.
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11(a)[1]
11(b)[8]
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