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答案:
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1.()xe "dx
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2.()xe dx
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3.⒈计算下列定积分 ⑴∫3 1 xe^2x dx ; ⑵∫5 1 ln xdx ; ⑶∫e 1 x^3 ln xdx ; ⑷ ∫π/2 0 xcos 2 xdx; ⑸∫e 1/e |ln x|dx .
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4.【单选题】(xe x ) (88) =( )
A. xe x B. 88e x C. xe x +88e x
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5.xe c
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6.Buen,,dx,,xed,33,xd,ee3,xe,,de3xd,,ed,e,3xeee,exxde,x3ddd3e,3,, x,, 3d,, ee, e,, 33e3 33,, 3, 3xde,3e
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7.计算定积分:①x2dx=________②dx=________③|x2-1|dx=________④-|sinx|dx=________
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8.Brook Wingman XE
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9.Buen,,dx,,xed,33,xd,ee3,xe,,de3xd,,ed,e,3xeee,exxde,x3ddd3e,3,, x,, 3d,, ee, e,, 33e3 33,, 3, 3xde,3e
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10.Độ xe nhật bản bánh xe hình chữ v