a-1a=4 হলে, a3-1a3 এর মান--
A
48
B
76
C
80
D
96
Correct Answer: 76
a³ - (1/a)³ = {a - (1/a)}³ + 3.a.(1/a){a - (1/a)} = 4³ + 3×4 = 64 + 12 = 76