4、原式=∫[x^(3/2)+x+3x^(-1/2)]dx
=(2/5)*x^(5/2)+(1/2)*x^2+6x^(1/2)+C
7、原式=∫[1/x+1/(1+x^2)]dx
=ln|x|+arctanx+C
高等数学求原函数!不定积分,4和7题
4、原式=∫[x^(3/2)+x+3x^(-1/2)]dx
=(2/5)*x^(5/2)+(1/2)*x^2+6x^(1/2)+C
7、原式=∫[1/x+1/(1+x^2)]dx
=ln|x|+arctanx+C