摘要
本文证明了现行高等数学教材中曲线凹凸性3种定义的等价性.
this article proves equivalence of the three definition of the concave and convex of a curve in the present higher mathematics teaching materials.
出处
《河北师范大学学报（自然科学版）》
CAS
1993年第2期34-36,共3页
Journal of Hebei Normal University：Natural Science
关键词
曲线的凹凸
切线
可导
等价性
curve concave convex tangent line differentiable eguivalence
