Mathematics · May / June 2020 · Paper 42 · Question 10
0580
As printed in the paper
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10(a)(i)[2]
5 [2]
M1 for (–1)4 – 4(–1)3
10(a)(ii)[6]
(0, 0) and (3, –27) [6]
B2 for 4x3 – 12x2 [ = 0]
or B1 for 4x3 or 12x2 AND
M1 for derivative = 0 or their derivative = 0
M1 for 4x2(x – 3)[= 0]
B1 for [x =] 0 and [ x =] 3 or [y =] 0 and [y =] –27 or for one correct coordinate pair
10(b)[2]
[p =] 11 [q =] 5 [2]
B1 for each dy = p − 1 + q − 1
or M1 for px 2 qx dx
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