a-3 = 0.2 হলে, a12 এর মান কত?

A 525

B 125

C 625

D 526

Solution

Correct Answer: Option C

a-3 = 0.2

=> 1/a3 = 2/10

=> a= 10/2

=> (a3)4 = (5)4 

∴ a12 = 625

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