化简求值 （x²／1＋y²／1＋xy／2﹚÷x²y²／x+y 当x+y-2013=0

题目

化简求值 （x²／1＋y²／1＋xy／2﹚÷x²y²／x+y 当x+y-2013=0
（x²分之1＋y²分之1＋xy分之2﹚÷x²y²分之x+y

答案

（x²分之1＋y²分之1＋xy分之2﹚÷x²y²分之x+y=（1/x+1/y）²×x²y²/(x+y)=(x+y)²/(x²y²)×x²y²/(x+y)=x+y;=2013;很高兴为您解答,skyhunter002为您答疑...