Mathematics · May / June 2023 · Paper 21 · Question 21
0580
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The question as text
A curve has equation y x x 12 3 = - .
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21(a)[3]
− 9 [3]
B2 for − 3 x 2 12 isw 2 − 2 −
or B1 for 3 x k or kx 12
21(b)[3]
(− 2, 16) (2, − 16) [3]
M1 for their dy 2 − ) = 0 or stating = 0 (3 x 12 dx
A1 for x = ± 2 or (− 2, 16) or (2, − 16)
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