5&(-3)=[5×(-3)]/[1-5×(-3)]=-15/16
(1&4)=(1×4)/(1-1×4)=-4/3
(1&4)&1/5=(-4/3)&1/5=(-4/3×1/5)/[1-(-4/3)×1/5]=-4/19能不能把题号写清点O(∩_∩)O谢谢(1)5&(-3)=[5×(-3)]/[1-5×(-3)]=-15/16(2)(1&4)=(1×4)/(1-1×4)=-4/3(1&4)&1/5=(-4/3)&1/5=(-4/3×1/5)/[1-(-4/3)×1/5]=-4/19 (2)综合起来写:(1&4)&1/5=[(1×4)/(1-1×4)]&1/5=(-4/3×1/5)/[1-(-4/3)×1/5]=-4/19 不懂的话欢迎追问!-1又2/3的负倒数是多少-1又2/3=-(1+2/3)=-5/3-5/3的倒数是-3/5所以-1又2/3的倒数就是-3/5