A = (81)x - 1 এবং B = 9x - 1 হলে, A ÷ B -এর মান কত?

A 9

B 9- 1

C 9+ 1

D 9x + 1

Solution

Correct Answer: Option C

A ÷ B = A/B 
= {(81)x - 1}/(9x - 1)
= {(92)x - 1}/(9x - 1)
= {(9x + 1) (9x - 1)}/(9x - 1)
= 9x + 1

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