125(√5)2x = 1 হলে, x এর মান কত?

 

A 3

B -3

C 9

D কোনটিই না

Solution

Correct Answer: Option B

125(√5)2x = 1
⇒(√5)2x =1/125
⇒ (5 1/2 )2x = 5 -3 
⇒ x = -3

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