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求不定积分∫e的三次根号x幂dx

来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/18 01:22:37
求不定积分∫e的三次根号x幂dx
z³ = x,dx = 3z² dz
∫ e^[x^(1/3)] dx
= 3∫ z²e^z dz = 3∫ z² de^z
= 3z²e^z - 3∫ 2ze^z dz
= 3z²e^z - 6∫ z de^z
= 3z²e^z - 6ze^z + 6∫ e^z dz
= 3z²e^z - 6ze^z + 6e^z + C
= 3[z² - 2z + 2]e^z + C
= 3[x^(2/3) - 2x^(1/3) + 2]e^[x^(1/3)] + C