计算:(y-x-1)÷(x-y-1).(结果不含负整数指数幂)
问题描述:
计算:(y-x-1)÷(x-y-1).(结果不含负整数指数幂)
答
原式=(y−
)÷(x−1 x
)1 y
=
÷xy−1 x
xy−1 y
=
•xy−1 x
y xy−1
=
.y x