题目内容
(请给出正确答案)
[单选题]
设函数f(x)=(x+1)/x,f(x-1)=()
A.1/(x+1)
B.x/(x+1)
C.1/(x-1)
D.x/(x-1)
答案
D、x/(x-1)
如果结果不匹配,请 联系老师 获取答案
A.1/(x+1)
B.x/(x+1)
C.1/(x-1)
D.x/(x-1)
D、x/(x-1)
已知函数f(x)=1og3(x+1)+log3(5-x),则f(x)的()
A.最大值为3
B.最大值为9
C.最大值为2
D.最小值为2