作业帮y=cos立方(1-2x),求y'和dy
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y=cos立方(1-2x),求y'和dy
y=cos立方(1-2x),求y'和dy
y=cos立方(1-2x),求y'和dy
y=cos^3(1-2x)
y'=3cos^2(1-2x)*(-sin(1-2x))(-2)=6cos^2(1-2x)*sin(1-2x)
dy=y'dx=6cos^2(1-2x)*sin(1-2x)dx
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