(X-1)(X-2)(X+2)(X+3)=60(X-1)(X-2)(X-3)(X-4)+1=0(X-5)/(X-6)+(X-8)/(X-9)=(X-7)/(X-8)+(X-6)/(X-7)
问题描述:
(X-1)(X-2)(X+2)(X+3)=60
(X-1)(X-2)(X-3)(X-4)+1=0
(X-5)/(X-6)+(X-8)/(X-9)=(X-7)/(X-8)+(X-6)/(X-7)
答
分组,之后代换
1.(x-1)(x+2)一组, (x-2)(x+3)一组
2. (x-1)(x-4)一组, (x-2)(x-3)一组
3直接通分
答
分组,之后代换
1.(x-1)(x+2)一组, (x-2)(x+3)一组
2. (x-1)(x-4)一组, (x-2)(x-3)一组
3直接通分