{a - (1/a)} = 4 হলে, a2 + 1/a2 = কত ?

A 22

B 18 //

C 16 //

D 14 //

E //

Solution

Correct Answer: Option B

প্রদত্ত রাশি, {a2 + (1/a) }= {a-(1/a)}2 + 2.a.(1/a)
 
= 42 + 2 = 16 + 2 = 18 

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