a+(1/a) = 2 হলে a 2 + (1/ a 2 )= কত?

a+(1/a) = 2 হলে a ² + (1/ a ² )= কত?

A 1

B 2

C 4

D 8

Correct Answer: Option B

দেওয়া আছে,
a+(1/a) = 2
∴ a ² +( 1/ a ² )= {a +( 1/ a )} ²- 2.a.1/a
= 2 ² - 2
= 4 - 2
= 2