qiaoye32803 发表于 2012-5-30 10:08:31

一个复数问题

式2-128怎么得来的呢，哪位大侠能告诉我详细步骤呢:handshake

tonnyw 发表于 2012-5-30 12:59:27

I don't feel that 2-128 is correct. If I use e^x = 1 + x, I cannot get 2-128.

qiaoye32803 发表于 2012-5-30 14:36:57

tonnyw 发表于 2012-5-30 12:59 static/image/common/back.gif
I don't feel that 2-128 is correct. If I use e^x = 1 + x, I cannot get 2-128.

这是《机构精确度》这本书上的，第112页，我实在是算不出，到处求救的:'(

tonnyw 发表于 2012-5-30 23:36:51

2-128 is definitely wrong.

zsq-w 发表于 2012-6-1 14:26:38

tonnyw 发表于 2012-5-30 23:36 static/image/common/back.gif
2-128 is definitely wrong.
赞同tonny版主。

原文作者指明忽略二阶以上微量，一阶微量不可忽略，则exp（Δ）= 1+Δ. 这里原文作者误做exp（Δ）=1 了。

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