The coefficients of ap and aq in the expression of (1 + a) p+q We know, bp+1 = p+qCp × p and bq+1 = p+qCq × q Coefficient of ap = p+qCp = [p+q]!/p!q! and Coefficient of aq = p+qCq = [p+q]!/p!q! Therefore, coefficients of ap and aq in the expression of (1 + a)p+q are equal.
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