2n2 - 2n
2n-2(1-2n)
2n + 22n + 2
22n
Correct answer is A
1/4(2n - 2n+2) = 2-2(2n - 2n x 22) = 2n x -2(1 - 22)= 22n-2 (20 - 22) = 22n-2 - 2n
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