求解需要过程16.17.18题
2个回答
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(16)
y=x^2+3tanx + sin(π/3)
y'=2x+3(secx)^2
(17)
y=x^3.lnx+e^x.cosx
y' = lnx d/dx(x^3) + x^3.d/dx(lnx) + e^x.d/dx(cosx) + cosx. d/dx(e^x)
y' = 3x^2.lnx + x^2 + (cosx-sinx)e^x
(18)
y=[sin(e^x)]^2
y'
=2[sin(e^x)] .d/dx [sin(e^x)]
=2[sin(e^x)] . [cos(e^x)] .d/dx (e^x)
=2[sin(e^x)] . [cos(e^x)] . (e^x)
=e^x. sin(2e^x)
y=x^2+3tanx + sin(π/3)
y'=2x+3(secx)^2
(17)
y=x^3.lnx+e^x.cosx
y' = lnx d/dx(x^3) + x^3.d/dx(lnx) + e^x.d/dx(cosx) + cosx. d/dx(e^x)
y' = 3x^2.lnx + x^2 + (cosx-sinx)e^x
(18)
y=[sin(e^x)]^2
y'
=2[sin(e^x)] .d/dx [sin(e^x)]
=2[sin(e^x)] . [cos(e^x)] .d/dx (e^x)
=2[sin(e^x)] . [cos(e^x)] . (e^x)
=e^x. sin(2e^x)
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