4x + 4x + 4x + 4x এর মান কোনটি?

A 44x

B 22x

C 28x

D 22x + 2

Solution

Correct Answer: Option D

4x + 4x + 4x + 4x 
= 4x(1 + 1 + 1 + 1)
= 4x . 4
= 4x + 1
= (22)x + 1
= 22x+ 2

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