Depending on the graph of a cubic polynomial

dr_yin · 2015-10-16 14:28:11Z

Depending on the graph of a cubic polynomial简介

来源: dr_yin 于 2015-10-16 14:28:11 [档案] [旧帖] [给我悄悄话] 本文已被阅读： 0 次 (734 bytes)

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回答: 跟提供的解法3类似由怪哉于 2015-10-16 14:05:59

First, the solutions on AOPS site depends on the graph of a cubic polynomail. Some calculus is needed to detail the graph of a cubic polynomial.

Second, they are hard to understand, especially on which values should be positive or negative.

I gave a solution without this dependency and it is easy to explain.

I went further to find the polynomial. The polynomial does not satisfy the condition of the problem.

What is wrong with my solution?

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