TMUA Specimen Paper 1 Q20 — Worked Solution

P1·Algebra & Surds·7.0Specimen · P1 · Q20

binomial-expansioncoefficient-extractiontruncation

The coefficient of

x^{2}

in the expansion of

(4 - x^{2}) [(1 + 2 x + 3 x^{2})^{6} - (1 + 4 x^{3})^{5}]

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