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(2)
y
=√x.(x^3+√x-1)
=x^(7/2) + x -√x
y' = (7/2)x^(5/2) +1 - 1/(2√x)
(5)
y=arcsin(3x-1)
y'
={ 1/√[ 1-(3x-1)^2] } .(3x-1)'
=3/√[ 1-(3x-1)^2]
=3/√(6x-9x^2)
y
=√x.(x^3+√x-1)
=x^(7/2) + x -√x
y' = (7/2)x^(5/2) +1 - 1/(2√x)
(5)
y=arcsin(3x-1)
y'
={ 1/√[ 1-(3x-1)^2] } .(3x-1)'
=3/√[ 1-(3x-1)^2]
=3/√(6x-9x^2)
追问
还有一道微分题,可以帮忙解了嘛,谢谢您
追答
y=xcos2x
y'
= cos2x + x(cos2x)'
= cos2x + x(-sin2x).(2x)'
= cos2x -2x.sin2x
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