If (square of x) + (inverse square of x) = 102, evaluate x + (inverse of x)?

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Shambhavi Shinde

Squaring (x+1/x) , we get, (x^2+x^-2+2), but we know that x^2+x^-2 is equal to 102, thus (x+1/x)+2=102+2=104.
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