Mathematics · Oct / Nov 2023 · Paper 22 · Question 25
0580
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The derivative of ax x 2 3 k 7 + is x x 42 15 k 6 1 + - . Find the value of a and the value of k. a = k = [2] Question 26 is printed on the next page.
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a = 3 k = 5 [2]
B1 for each × 6 + k − 1
or M1 for 2 7 ax 3 kx or better
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