直線(1+2k)x+(2-k)y-5=0恒過(guò)定點(diǎn)為
直線(1+2k)x+(2-k)y-5=0恒過(guò)定點(diǎn)為
數(shù)學(xué)人氣：309 ℃時(shí)間：2020-04-09 11:01:18
優(yōu)質(zhì)解答
x+2y-5+(2x-y)k=0,因?yàn)檫^(guò)定點(diǎn),令x+2y-5=0,2x-y=0推出x=1,y=2.過(guò)定點(diǎn)（1,2）
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