1.

DPP set) = 4, then Rind x-:-?

Answer»

(x+1/x)^2= 16= x^2+1/x^2+2x^2+1/x^2= 14supposex-1/x= y(x-1/x)^2= y^2x^2+1/x^2-2= y^2y^2= 12y= +-12x-1/x= +-12



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