∫ e^(3√x) dx令√x=u,则x=u²,dx=2udu=∫ 2ue^(3u) du=(2/3)∫ u de^(3u)=(2/3)ue^(3u) - (2/3)∫ e^(3u) du=(2/3)ue^(3u) - (2/9)e^(3u) + C=(2/3)√xe^(3√x) - (2/9)e^(3√x) + C 【数学之美】团队为您解答...