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(17)∫(x-12x-ah- (18)∫ dr (19)∫223adx; (20)∫(3+sina)d 2.求一曲线y=f(x),它在点(x,f(x)处的切线的斜率为2x,且通过 点(2,5) 3.已知f(x)满足给定的关系式,试求f(x) (1)rf(x)=1(x>0); ∫(x) (3)f(x)f(x)=1(x>0); 1(f(x)>0) §2换元积分法与分部积分法 用凑微分法求下列不定积分: )∫m2 (3)∫a++a-4; (4)∫(+n3x) (5)∫a+xdx; (6)∫e-dr(17) R (cos x − 2 1+x2 − 1 4 √ 1−x2 )dx; (18) R px √ xdx; (19) R 2 2x3 xdx; (20) R (√ 3 4−4x2 + sin x)dx. 2.求一曲线y = f(x),它在点(x, f(x))处的切线的斜率为2x ,且通过 点(2, 5). 3.已知f(x)满足给定的关系式,试求f(x): (1) xf0 (x) = 1(x > 0); (2) f 0 (x) x = 1(x > 0); (3) f(x)f 0 (x) = 1(x > 0); (4) f 0 (x) f(x) = 1(f(x) > 0). §2 换元积分法与分部积分法 1.用凑微分法求下列不定积分: (1) R 1 5x−6 dx; (2) R 1 x(1+2x) dx; (3) R √ 1 x+1+√ x−1 dx; (4) R (√ 1 3−x2 + √ 1 1−3x2 )dx; (5) R 1 2+3x2 dx; (6) R e − x 2 dx; 2
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