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计算定积分(int )_(1)^edfrac (ln x)(x)dx.计算定积分
计算定积分(int )_(1)^edfrac (2+ln x)(x)dx.计算定积分.
(13)(int )_(1)^edfrac (ln x)(x)dx;
积分 (int )_(-1)^edfrac (1)(x)dx=ln e-ln |-1|=1 (int )_(-1)^edfrac (1)(x)dx=ln e-l
(int )_(1)^esin (ln x)dx.
(int )_(1)^edfrac (dx)(xsqrt {1-{(ln x))^2}}..
int cos (ln x)dx..
int dfrac (1+ln x)({(xln x))^2}dx..
[题目] int cos (ln x)dx.
=(int )_(-1)^1(f(x)+f(-x)+x} cdot ln (sqrt (1+{x)^2}+x)dx..