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Proven Potential TMUA Sample Paper 1 · Q10

Paper 1Algebra

You are given the equation

(k+(1+x)3)5,where ∣k∣<100.(k+(1+x)^3)^5,\qquad\text{where }|k|<100.

The coefficient of x9x^9 is 2845, what is the coefficient of x7x^7?

A64356435
B−6435-6435
C14401440
D−1440-1440
E4545
F−45-45
G79207920
H−7920-7920

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