Question

X[X/（Y+X）+X/（X-Y）]=120/288

Answer 1

没法解,化简得：

x[2 x^2 /(x^2 - y^2 )]=120/288

若 x=ty;则有 t^2 y/(t-1)=60/288.无穷解

若方程为：X/（Y+X）+X/（X-Y）=120/288

x^2 /(x^2 - y^2 )]=60/288左右两边取倒数,1-(y/x)^2=288/60

y/x=√(19/5) 所以 x/y=√(5/19)