(1/a+1)÷(1-1/a2) = কত?

(1/a+1)÷(1-1/a²) = কত?

A a

B a/(a+1)

C a/(a-1)

D a(a−1)

Solution

Correct Answer: Option C

(1/a+1)÷(1-1/a²)

= (1/a+1) ÷ (1+1/a) (1-1/a)

= (1 - 1/a)^-1

= (a-1/a)^-1

= a/a-1