Discuss Forum
1. a - 1/a = 5√3 হলে, a2 + 1/a2 = কত?
- A. 77
- B. 77
- C. 77
- D. 77
Answer: Option A
Explanation:
a - 1/a = 5√3
a2 + 1/a2
= (a)2 + (1/a)2
= (a - 1/a)2 + 2.a.1/a
= (5√3)2 + 2
= 75 + 2
=77
Post your comments here:
1. a - 1/a = 5√3 হলে, a2 + 1/a2 = কত?
Answer: Option A
Explanation:
a - 1/a = 5√3
a2 + 1/a2
= (a)2 + (1/a)2
= (a - 1/a)2 + 2.a.1/a
= (5√3)2 + 2
= 75 + 2
=77
Post your comments here: