TMUA 2018 Paper 1 Q7 — Worked Solution

P1·Algebra & Surds·5.0Official · 2018 · Q7

binomial-expansioncoefficient-equationisolate-constant

The non-zero constant

k

is chosen so that the coefficients of

x^{6}

in the expansions of

(1 + k x^{2})^{7}

and

(k + x)^{10}

are equal. What is the value of

k

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