急 Find the point(s) on the graph f(x)=x^3/3-3x where the tangent is parallel to y=x

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急Findthepoint(s)onthegraphf(x)=x^3/3-3xwherethetangentisparalleltoy=x急Findthepoint(s)onthegraphf(x)=

急 Find the point(s) on the graph f(x)=x^3/3-3x where the tangent is parallel to y=x
急 Find the point(s) on the graph f(x)=x^3/3-3x where the tangent is parallel to y=x

急 Find the point(s) on the graph f(x)=x^3/3-3x where the tangent is parallel to y=x
对f(x)求导,即:
f'(x)=x^2-3
y=x的斜率是1,所以
令f'(x)=1
就可以得出x=2,-2
这两个点满足题意.