Question

(A/B) + (C/A) = B/C 简化为A＝...

Answer 1

(A/B) + (C/A) = B/C

两边都乘以ABC,得A^2*C+BC^2=AB^2,

整理得关于A的二次方程 A^2*C-AB^2+BC^2=0,

△=B^4-4BC^3,

当△>=0时A=(B^2土√△)/(2C).

当△