x-1x=4 হলে , x4+1x4= কত ?

x-1x=4 হলে , x4+1x4= কত ? Correct Answer 34

x - 1/x = 2 হলে, x4 + 1/x4 = (x2)2 + (1/x2)2 = (x2 + 1/x2)2 - 2.x.1/x = {(x - 1/x)2 + 2.x.1/x}2 - 2 = {(2)2 + 2}2 - 2 = (4 + 2)2 - 2 = (6)2 - 2 = 36 - 2 = 34  (Ans)

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x-1x=2 হলে x41x4= কত ?
x-1x=2 হলে x41x4= কত ?