8. If x +y -25 and xy-12, then the value of x1+ yl is – InterviewSolution

1.	8. If x +y -25 and xy-12, then the value of x1+ yl is
Answer» (X+y)^2=x^2+y^2+2xy=25+2(12)=49hencex+y=7x+y=-7now x^-1+y^-1=1/X+1/y=X+y/XYif X+y=7then answer will be 7/12if X+y=-7answer will be -7/12

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