计算定积分 (int )_(0)^1(2x+1)dx.

计算定积分(int )_(1)^edfrac (2+ln x)(x)dx.计算定积分.

计算定积分(int )_(1)^edfrac (ln x)(x)dx.计算定积分

计算定积分(int )_(0)^1dfrac (x)(x+1)sqrt (1-{x)^2}dx.计算定积分.

2.计算定积分int_(0)^1ln(1+sqrt(x))dx.2.计算定积分$\int_{0}^{1}\ln(1+\sqrt{x})dx$.

[题目]计算定积分 (int )_(0)^1dfrac (1)(1+sqrt {x)}dx.

14、计算定积分int_(1)^e(ln^2x)/(x)dx.14、计算定积分$\int_{1}^{e}\frac{\ln^{2}x}{x}dx$.

15.计算定积分I=int_(1)^3|x-2|dx.15.计算定积分$I=\int_{1}^{3}|x-2|dx$.

[题目]计算定积分: (int )_(4)^9sqrt (x)(1+sqrt (x))dx.

17.计算定积分int_(0)^sqrt(2)(x^2)/(sqrt(4-x^2)) dx.17.计算定积分$\int_{0}^{\sqrt{2}}\frac{

计算下列定积分：(int )_(0)^1ln (x+1)dx.计算下列定积分：.