(1/a+1)÷(1-1/a2) = কত?

(1/a+1)÷(1-1/a²) = কত?

A a/(a+1)

B a/(a-1)

C a(a+1)

D a(a-1)

Correct Answer: Option B

(1/a + 1) ÷ (1 - 1/a²)
= {(1+a)/a} ÷ {(a² - 1)/a²}
= (a+1)/a × a²/(a+1)(a-1)
= a/(a-1)