求f(x)=ax^2 bx cy=x^3 x-2X^2-3XY 2Y^2AD BE CF=(AB BC CA) (BC/2 CA/2 AB/2)

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求f(x)=ax^2bxcy=x^3x-2X^2-3XY2Y^2ADBECF=(ABBCCA)(BC/2CA/2AB/2)求f(x)=ax^2bxcy=x^3x-2X^2-3XY2Y^2ADBECF=

求f(x)=ax^2 bx cy=x^3 x-2X^2-3XY 2Y^2AD BE CF=(AB BC CA) (BC/2 CA/2 AB/2)
求f(x)=ax^2 bx cy=x^3 x-2
X^2-3XY 2Y^2AD BE CF=(AB BC CA) (BC/2 CA/2 AB/2)

求f(x)=ax^2 bx cy=x^3 x-2X^2-3XY 2Y^2AD BE CF=(AB BC CA) (BC/2 CA/2 AB/2)
x∈Z},B=所以y'=2x-4>0 (3≤x≤5)所以y=sinx平方 cosx平方与y=1x=1 rcosA,y=-1 rsinA,r>0,A