p + 1/p = 5 হলে p3 + 1/p3 = কত?

p + 1/p = 5 হলে p³ + 1/p³ = কত?

A 100

B 110

C 115

D 120

Solution

Correct Answer: Option B

p³ +1/p³ =(p+1/p)³ -3.p.1/p(p+1/p)
=(5)³-3(5)
=125-15
=110