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- 企业事业单位考试
答案:
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1.(9)y( -2y" y"=0
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2.(5) 2y" y=0,H0)=(0)=y(0)=0,'(0
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3.13、设y=y(x)满足y" 2y y=0,且y(0)=0,y(0)=1,则y(x)dx
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4.20.设x>0,y>0,x 2y=5,m(x 1)(2y 1的最小值为
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5.(3)y 3y 2y=3xe-x
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6.已知x>0,y>0,且x 2y xy=30,求xy的最大值.
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7.Cx=10, y=bDx=2y=b
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8.Дана линейная функция y=kx 7y=kx 7.
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9.y(k) 2y(k-1) 5 y(k-2) =3f(k)-4 f(k-1)
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10.xyz<>0, 问x(y z)>0?(1)|x y|=|x| |y(2)|y z|=|y| |z