Question
Find the coefficient of x³ in (2x −
3)⁶.Solution
ATQ,
ATQ,
General term: Tₖ₊₁ = C(6,k)(2x(6−k)(−3)k For x³ → power of x = 3 → (6 − k) = 3 ⇒ k = 3 Coeff = C(6,3)·2³·(−3)³ = 20·8·(−27) = −4320
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