設(shè)那個(gè)對(duì)稱(chēng)的點(diǎn)為Q（x,y）
列方程
（-1+x）/2,（y+2）/2,把代到直線L中.
(1)2*+3 -4=0
(2)p y-2/x+1=3/2 ----------pQ的連線與直線L垂直.所以斜率相乘=-1
求點(diǎn)P(-1,2)關(guān)于直線L:2X+3y-4=0對(duì)稱(chēng)的點(diǎn)的坐標(biāo)
求點(diǎn)P(-1,2)關(guān)于直線L:2X+3y-4=0對(duì)稱(chēng)的點(diǎn)的坐標(biāo)
數(shù)學(xué)人氣：414 ℃時(shí)間：2020-07-19 18:08:45
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