<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:content="http://purl.org/rss/1.0/modules/content/"><channel><title>空間向量 on MathManStudio.com</title><link>https://mathmanstudio.com/categories/%E7%A9%BA%E9%96%93%E5%90%91%E9%87%8F/</link><description>Recent content in 空間向量 on MathManStudio.com</description><generator>Hugo</generator><language>zh-TW</language><lastBuildDate>Wed, 01 Jul 2026 20:36:41 +0800</lastBuildDate><atom:link href="https://mathmanstudio.com/categories/%E7%A9%BA%E9%96%93%E5%90%91%E9%87%8F/index.xml" rel="self" type="application/rss+xml"/><item><title>114高中數學學測數A (多選8)</title><link>https://mathmanstudio.com/posts/114%E9%AB%98%E4%B8%AD%E6%95%B8%E5%AD%B8%E5%AD%B8%E6%B8%AC%E6%95%B8a-%E5%A4%9A%E9%81%B88/</link><pubDate>Wed, 01 Jul 2026 20:36:41 +0800</pubDate><guid>https://mathmanstudio.com/posts/114%E9%AB%98%E4%B8%AD%E6%95%B8%E5%AD%B8%E5%AD%B8%E6%B8%AC%E6%95%B8a-%E5%A4%9A%E9%81%B88/</guid><description>&lt;p&gt;&lt;img loading="lazy" src="https://mathmanstudio.com/wp-content/uploads/2026/07/%E6%88%AA%E5%9C%96-2026-07-01-%E6%99%9A%E4%B8%8A7.33.00-1024x397.png"&gt;&lt;/p&gt;
&lt;p&gt;將原式配方整理後可得圓方程式如下：&lt;/p&gt;
&lt;p&gt;$$
（x-1）^2+y^2=4
$$&lt;/p&gt;
&lt;p&gt;此為圓心（1,0）半徑=2之圓方程式&lt;/p&gt;
&lt;p&gt;$$
(1)直線方程式x=3與此圓方程式之切線，交於1點，有兩相等實根。
$$&lt;/p&gt;
&lt;p&gt;（2）此圖形並未於原點有點對稱的現象。&lt;/p&gt;
&lt;p&gt;（3）正確。&lt;/p&gt;
&lt;p&gt;（4）解方程式判斷有無交點即可。&lt;/p&gt;
&lt;p&gt;$$
y=-x+4\quad代入（x-1）^2+y^2=4
$$
$$
整理後可得x^2-5x+\frac{13}{2}=0
$$
$$
判別式&amp;lt;0\rightarrow無交點
$$&lt;/p&gt;
&lt;p&gt;(5)求極值當然用柯西不等式啦！&lt;/p&gt;
&lt;p&gt;$$
令\vec{a}=(x-1,y)\quad\vec{b}=(1,-1)
$$
$$
[(x-1)^2+y^2]\times[1^2+(-1)^2]\ge（x-1-y）^2
$$
$$
1-2\sqrt{2}\le x-y\le1+2\sqrt{2}
$$&lt;/p&gt;
&lt;p&gt;正解：（3）（5）&lt;/p&gt;</description></item><item><title>114高中數學學測數A（單選6）(空間向量)</title><link>https://mathmanstudio.com/posts/114%E9%AB%98%E4%B8%AD%E6%95%B8%E5%AD%B8%E5%AD%B8%E6%B8%AC%E6%95%B8a%E5%96%AE%E9%81%B86/</link><pubDate>Sun, 28 Dec 2025 20:32:11 +0800</pubDate><guid>https://mathmanstudio.com/posts/114%E9%AB%98%E4%B8%AD%E6%95%B8%E5%AD%B8%E5%AD%B8%E6%B8%AC%E6%95%B8a%E5%96%AE%E9%81%B86/</guid><description>&lt;p&gt;&lt;img loading="lazy" src="https://mathmanstudio.com/wp-content/uploads/2025/10/%E6%88%AA%E5%9C%96-2025-10-27-%E6%99%9A%E4%B8%8A7.06.26-1024x774.png"&gt;
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