作业帮设Y=Cos更号X+2X.求Dy.
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设Y=Cos更号X+2X.求Dy.
设Y=Cos更号X+2X.求Dy.
设Y=Cos更号X+2X.求Dy.
dy=[-sin√x*(1/2)*x^(-1/2)+2]dx.
={-sin√x*[1/(2√x)]+2}dx.
={-[1/(2√x)*sin√x]+2}dx
dy/dx=-sqrt(x)sin(sqrt(x))/2x+2
设Y=Cos更号X+2X.求Dy.
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