解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
问题描述:
解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
答
另a=1/(x+y),b=1/(x-y);则2a+5b=18;9a+10b=66;解得a=6,b=6/5;即 1/(x+y)=6 ...
解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
另a=1/(x+y),b=1/(x-y);则2a+5b=18;9a+10b=66;解得a=6,b=6/5;即 1/(x+y)=6 ...