题目30. (2.0分) 判int_(0)^1sqrt(2x+1)dx=(1)/(2)int_(0)^1sqrt(2x+1)d(2x+1)()A. 对B. 错30. (2.0分) 判 $\int_{0}^{1}\sqrt{2x+1}dx=\frac{1}{2}\int_{0}^{1}\sqrt{2x+1}d(2x+1)()$A. 对B. 错题目解答答案A. 对