y=3+x^2,y'=?
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y=3+x^2,y'=?
y=3+x^2,y'=?
y=3+x^2,y'=?
y=3+x^2,y'=3'+(x^2)'=0+2x*(2-1)=2x
导数?
y'=2x
y=x^n的导数即为 y‘=nx^(n-1)
y=3+x^2, y'=0+2x×2-2x=2x
y=3+x^2,
y'=2x
y'=2x,因为常数的导数为0,然后y=x^n的导数为 y‘=nx^(n-1),口诀可以记成指数落地再减一。
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