Question

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EXAMPLE 14 If O be the sum of odd terms and E that of even terms in the expansion of (x + a)", prove
(1) 0² – E² = (x² – a²)^n
(ii) 4 OE = (x + a)^2n - (x - a)^ 2n
(iii) 2 (0^2 + E^2) = (x + a)^2n + (x – a)^ 2n​

Answer 1

Answer:

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