Today Isaw a butterfly

来源：百度知道 编辑：UC知道 时间：2024/06/30 11:25:48
Today Isaw a butterfly
as it floated in the air;
Its wings wrer spread in splendor,
Unaware that i was there.

It was such a thing of beauty
It was a sight to see
It was the perfect masterpiece
full of grace and majesty

I found myself thinking
to what can this compare/
And then,of course,I thought of you
And I wished that you were there
God sure was estra careful
When he formed and fashioned you
You too,became a masterpiece
Yet god is still not through

He's daily ****** changes,
that other folks can't see
you're already true perfection

At least you are to me/

你要干吗呢

F

解：左边表示平行于c 的向量，右边即(b*c)*a表示平行于a 的向量，模不一定相等，故命题错误

为什么呢？请帮忙解释一下

这是向量问题的典型错误
(a*b)*c中a*b 是一个数量,由共线向量a=xb得知(a*b)*c表示平行于c 的向量,同理(b*c)*a表示平行于a 的向量,(a*b)*c与(b*c)*a模不一定相等故命题错误

a