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
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