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(26)∫+dr; (27)J (28)∫√a (29)J=cdx; (30)J√1+sind 2.用换元积分法求下列不定积分: (2)J=d (3)Jx 2+r-r2d r (5)∫ (6)∫ x+√x2-1 (7)∫em+dx; (8)∫江H+d (10)J+√ (11)J-d; (12)「碳d 3.用分部积分法求下列不定积分:(26) R arctan x 1+x2 dx; (27) R dx √ x √ 1+√ x ; (28) R √ dx x(1+x); (29) R e x √ 1−e 2x dx; (30) R √ 1 + sin xdx. 2.用换元积分法求下列不定积分: (1) R √ x 2 − a 2dx; (2) R x 2 √ 4−x2 dx; (3) R √ x 5+x−x2 dx; (4) R √ 2 + x − x 2dx; (5) R dx (x2+a 2) 3/2; (6) R dx x+ √ x2−1; (7) R e √ x+1dx; (8) R √ √x+1−1 x+1+1 dx; (9) R √ x 1+√3 x dx; (10) R x 1+√ x dx; (11) R x 5 √ 1−x2 dx; (12) R x 2+2 (x+1)3 dx. 3.用分部积分法求下列不定积分: 4
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