數學問題大概是高職的:Realtime－線上遊戲排行榜2013/2014,進擊的巨人線上看,candy crush saga外掛,正妹寫真三圍

Blogtrottr

Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 已解決

Looking for a Helpdesk?

Try Freshdesk - the preferred Helpdesk system of over 23000 businesses. So easy, sets up in two minutes!

From our sponsors

數學問題大概是高職的

Aug 18th 2014, 07:41

試求x軸上求一點P，使其到兩定點A(－3，2)，B(4，－5) 距離相等
Sol
設P(x．0)
AP^2=(x+3)^2+2^2=x^2+6x+13
BP^2=(x－4)^2+5^2=X^2－8x+41
AP^2=BP^2
x^2+6x+13=x^2－8x+41
14x=28
x=2
P(2，0)
or
L1：AB直線方程式：(y－2)/(x+3)/(－5－2)/(4+3)=－1
x+3=－y+2
x+y=－1
AB中點C(0.5，－1.5)
L2過C垂直AB直線
L2直線方程式:x－y=2
L3與x軸交於(2，0)
P(2，0)

This entry passed through the Full-Text RSS service — if this is your content and you're reading it on someone else's site, please read the FAQ at fivefilters.org/content-only/faq.php#publishers.

You are receiving this email because you subscribed to this feed at blogtrottr.com.

If you no longer wish to receive these emails, you can unsubscribe from this feed, or manage all your subscriptions