z + 1/z = 4 হলে, z3 + 1/z3 এর মান হবে-

A 42

B 48

C 52

D 76

Solution

Correct Answer: Option C

z3 + 1/z3
=(z + 1/z)³-3.z .1/z((z + 1/z))
=(4)³-3(4)
=64-12
=52
 

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