2a/3b=2b/3a; 1/a 2/b=3;
答案如下:
望采纳!
2a/3b=2b/3a; ①1/a +2/b=3。②由①,a^2=b^2,a=土b,把a=b代入②,得3/b=3,a=b=1;把a=-b代入②,1/b=3,b=1/3,a=-1/3.
都等于1