Question

यदिx-1/x=3 तो x4+1/x4
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Answer 1

Answer:

(x-1/x)^2 = x^2+1/x^2-2*x*1/x

= x^2+1/x^2-2

= 9

so

x^2+1/x^2= 11

taking square both side

(x^2 + 1/x^2)^2 = 121

x^4+1/x^4+2=121

x^4+1/x^4 = 121-2=119