1解:2^x=5^y=10x=log<2>{10}=lg10/lg2=(lg2+lg5)/lg2∴ x=1+lg5/lg2∴x-1=lg5/lg2y=log<5>{10}= lg10/lg5=(lg5+lg2)/lg5∴ y=1+lg2/lg5∴ y-1=lg2/lg5∴(x-1)(y-1)=1展开得,xy-x-y+1=1xy-x-y=0xy=x+y∴(x+y)/(xy)=1
题目错没?发图上来吧
等于10