a + 1a= 3 হলে a3 + 1a3 = কত?
A
9
B
3
C
7
Correct Answer:
প্রদত্ত রাশিমালা = a3 + 1a3 = (a + 1a)3 - 3×a×1a(a + 1a) = (3)3 - 33 = 0