Question

函數(shù)y＝l+logx(a＞0且a≠1的反函數(shù)是

1. A.
   y＝a^x-1(x＞1)
2. B.
   y＝a^x-1(x∈R)
3. C.
   y＝a^x+1(x∈R)
4. D.
   y＝a^x+1(x＞1)

Answer 1

B