1.

12. Ifx be a positive real number such that x2+_2=50, then evaluate x+-.

Answer»

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

(x+1/x)^2=50/7+2=64/7x+1/x=(64/7)^(1/2)



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