Question: 1 7 By giving x appropriate numerical values in the expansion of ( 1 + x ) 2 n , where n is a positive

17 By giving x appropriate numerical values in the expansion of (1+x)2n, where n is a positive integer, prove that
(a)?2nC1+?2nC2+?2nC3+cdots+?2nC2n-1=2(22n-1-1)
(b)1-22nC1+42nC2-82nC3+cdots+(-2)2n=1
(c)?2nC0+?2nC2+?2nC4+cdots+?2nC2n=?2nC1+?2nC3+?2nC5+cdots+?2nC2n-1=22n-1
1 7 By giving x appropriate numerical values in

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