3.2n – 4.2n-2 = কত?

A 1

B 2 n+1

C 3

D 2 n

Solution

Correct Answer: Option B

3.2n-4.2n-2
=3.2n-22.2n-2
=3.2n-2n-2+2
=3.2n-2n=2n(3-1)
=2n.2
=2n+1

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