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1 . 3.2n - 4.2n-2 = কত?

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Answer: Option A

Explanation:

3.2^n−4.2^(n−2)
=3.2^n−2^2.2^(n−2)
=3.2^n−2^(2+n−2)
=3.2^n−2^n
=2^n(3−1)
=2^n.2
=2^(n+1)