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Question

The value of 22n22n(n1)8n12(n1)(n+1) will be

A
2
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B
0
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C
12
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D
14
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Solution

The correct option is C 0
Given,

22n22n(n1)8n12(n1)(n+1)

=22(n1)2n×2(n1)23(n1)2(n1)(n+1)

=22×2(n1)2n×2(n1)23×2(n1)2(n1)(n+1)

=22×2(n1)2n×2(n1)23×2(n1)2(n1)2(n+1)

=222n232n+1

=222n232n×21

=222n222n

=0

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