作者king911015 (早已放弃爱上你)
看板trans_math
标题[微分]
时间Wed Jan 24 22:23:58 2007
For what value or values of the constant K will the curve
y=X^3+kX^2+3X-4 have exactly one horizontal tangent?
Suppose a,b are constants such that lim sin2x a
x->0 (------- + ---- + b )=0
x^3 x^2
then a+b =?
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