题目
4.(2.0分)下列函数中,定义域为R的是A. y = (1)/(x - 1)B. y = sqrt(x)C. y = ln xD. y = sin x
4.(2.0分)下列函数中,定义域为R的是
A. $y = \frac{1}{x - 1}$
B. $y = \sqrt{x}$
C. $y = \ln x$
D. $y = \sin x$
题目解答
答案
D. $y = \sin x$
A. $y = \frac{1}{x - 1}$
B. $y = \sqrt{x}$
C. $y = \ln x$
D. $y = \sin x$