x=4+3 হলে, x3+1x3 এর মান কত?
A
53
B
52
C
5√2
D
2√5
Correct Answer: 52
x = √4+√31/x = (√4-√3)/(4-3)= √4-√3x+1/x = 2√4 = 4Now,x3+1/x3 = (x+1/x)3 – 3 . x . 1/x (x + 1/x)= 43 – 3×4= 64 - 12= 52