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答案:
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1.E: ty%F: n8
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2.(5)xy= e ty
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3.8)y'= e ty
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4.已知 f(x, y)=x y -xytan_,试求 f (tx,ty).ytx
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5.f(ξ )=f(e
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6.Ce 'f(e)-/(r)De 'f(e") f(x)
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7.8.设f(x)是连续函数且F(r)=f(t)d,则F(x)=AA、-e"f(e-) f(x)B、e 'f(e)-(r)C、'(e") f(
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8.ty
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9.-ty
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10.A.D ,E ,F B.F ,D ,E C.E, F ,D D.E, D,F