Mathematics (AS & A Level) · Oct / Nov 2020 · Paper 22 · Question 7
9709
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x y O A B A curve has equation y = fx where fx = x4 −5x3 + 6x2 + 5x −15. As shown in the diagram, the curve crosses the x-axis at the points A and B with coordinates a, 0 and b, 0 respectively.
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7(a)[2]
7(b)[5]
7(c)[3]
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