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(4)计算不定积分 int cos sqrt (x)dx.

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求不定积分int(x)/(1+cos x)dx.19.（5.0分）求不定积分$\int\frac{x}{1+\cos x}dx$.

1.求下列不定积分:-|||-(2) int dfrac (1-x)(sqrt {9-4{x)^2}}dx;-|||-__

求下列不定积分:-|||-int (e)^sqrt (3x+9)dx.

13.求不定积分 int dfrac (1)(1-sqrt {x+1)}dx.

(2025 浙江)求不定积分int(x^3)/(sqrt[3](1-2x^2) )dx.(2025 浙江)求不定积分$\int\frac{x^{3}}{\sqr