যদি 2x + 2x+ 2x+ 2x = 2n হয় তবে n এর প্রেক্ষিতে x এর মান কত?

A n+2

B n+4

C 2x-2

D n-2

Solution

Correct Answer: Option D

2x + 2x+ 2x+ 2x = 2n

⇒4.2x = 2n

⇒ 2².2x = 2n

⇒ 2x+2 = 2n

⇒ x + 2 = n

⇒ x = n - 2

 

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