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答案:
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1.2x★(1)f(x,y)=2x
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2.函数y=sin(2x−5)x的导函数为y=2xcos(2x−5)−sin(2x−5)x2y=2xcos(2x−5)−sin(2x−5)x2.
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3.y=tanx=sinx/cosx;y'=[(sinx)'cosx-sinx(cosx)']/cos^2x=(cos^2x+sin^2x)/cos^2x=()
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4.[单选题] A 1/2x B 2x C 1/2y D 2y
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5.2x 3=x﹣8
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6.已知f(x)是二次函数,且满足f(2x) f(3x 1)=26x2 7x 6,求f(x)的解析式.
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7.2x 2 (3xy 2 ﹣x 2 y)﹣2(xy 2 x 2 )
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8.\(设f(x),g(x)是可微函数,且满足u(x,y)=f(2x+5y)+g(2x-5y),\\u(x,0)=\sin {2x},u'_y(x,0)=0,则u(x,y)=(\,)\)
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9.【单选题】d( )=e 2x dx
A. e 2x B. e 2x +C C. e 2x +C D. e 2x
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10.Solve the following equation for x: 2x 5 = 17.