解不等式(x-4)/(x+1)

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解不等式(x-4)/(x+1)解不等式(x-4)/(x+1)解不等式(x-4)/(x+1)-1(x-4)/(x+1)x-4x=4OK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

解不等式(x-4)/(x+1)
解不等式(x-4)/(x+1)

解不等式(x-4)/(x+1)
-1

(x-4)/(x+1)<0
x-4<0
x=4
OK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

0

-1

因为(x-4)/(x+1)<0
所以(x-4)与(x+1)异号
所以(x-4)(x+1)<0
所以-1

是-1