送交者: wasguru 于 2006-5-26, 20:23:33:

回答: 这个好像还是比较容易证明的叫 由 eng 于 2006-5-26, 19:31:25:

而是验证。光有个“看着像”不行。若能想到先拉个皮尺去量它一量，也就不必浪费那么多功夫去“证明”了。

• Measuring with a tape is not doable - Nixrreg (66 bytes) 2006-5-26, 21:58:46
  • 抛物线的开口高度正比于开口宽度的平方。 - wasguru (0 bytes) 2006-5-27, 01:09:22
  • you just need a regular ruler, measure the X's and Y's - whoami (0 bytes) 2006-5-26, 22:26:01
    • How many X's and Y's do you need to measure? - Nixrreg (0 bytes) 2006-5-27, 00:13:14
      • N=2 - whoami (17 bytes) 2006-5-27, 00:38:05
        • Gee, the system ate my "greater than" sign - whoami (0 bytes) 2006-5-27, 00:40:08
          • So you meant N=>2? - Nixrreg (0 bytes) 2006-5-27, 00:43:07
            • That's what I meant - whoami (0 bytes) 2006-5-27, 00:44:39
              • Then how do you verify its not a parabolic curve? - Nixrreg (0 bytes) 2006-5-27, 00:57:57
                • GURU sai: "抛物线的开口高度正比于开口宽度的平方。" - whoami (0 bytes) 2006-5-27, 12:16:21

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