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X+1/x=2 then x10+1/x10=

Answer»

X+1/x=2
Then
(x+1/x)^2=2^2
x^2+2×x×1/x+1/x^2=4
x^2+2+1/x^2=4
x^2+1/x^2=2
x+1/x=x^2+1/x^2
That MEANS x=1.
10x+1/10x=2



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