解方程 (X-4/X-5)+(X-8/X-9)=(X-7/X-8)+(X-5/X-6)
问题描述:
解方程 (X-4/X-5)+(X-8/X-9)=(X-7/X-8)+(X-5/X-6)
答
∵X-4 / X-5 =1+(1 / x-5 )……∴(X-4/X-5)+(X-8/X-9)=(X-7/X-8)+(X-5/X-6)即[1+(1 / x-5 )]+[1+(1 / x-9 )] = [1+(1 / x-8 )]+[1+(1 / x-6 )]即1 / x-5 + 1 / x-9 = 1 / x-8 + 1 / x-6两边分别通分得...