3x/x^2-1 + x^2-1/3x = 2/5
问题描述:
3x/x^2-1 + x^2-1/3x = 2/5
答
3x/x^2-1 =Y;
x^2-1/3x =1/Y;
3x/x^2-1 + x^2-1/3x = 2/5
3x/x^2-1 =Y;
x^2-1/3x =1/Y;