题目设函数y=x^2lnx,则导数y'=()A. 2xlnx+xB. 2lnxC. 2xlnx+1D. 2设函数$y=x^{2}lnx$,则导数y'=()A. 2xlnx+xB. 2lnxC. 2xlnx+1D. 2题目解答答案A. 2xlnx+x