y=1/x^2,则dyRT
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y=1/x^2,则dyRTy=1/x^2,则dyRTy=1/x^2,则dyRTy=x^-2dy=-2x^-3dx=-2/x^3dxdy=-2/(x^3)dxy''=-2/x^3
y=1/x^2,则dyRT
y=1/x^2,则dy
RT
y=1/x^2,则dyRT
y=x^-2 dy=-2x^-3dx=-2/x^3dx
dy=-2/(x^3)dx
y'=-2/x^3
y=1/x^2,则dyRT
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