唔該!核對以下數,我做對嗎? (點斜式→一般式)
1.)y-0=-4(x-0)
y-0=-4(x-0)
0=-4y-y
L: 4x+y-0=0
2.) y-(-6)=3(x-0)
y+6=3x-3
6+3=3x-y
9=3x-y
L:3x-y-9=0
3.)y-0=4分1(x-(-2))
4(y-0)=x+2
4y-0=x+2
-2=x-4y
L:x-4y+2=O
(超急~唔該!)唔該!核對數,我做對了嗎?~~~15分10分
2009-09-07 2:55 am
回答 (3)
2009-09-07 5:38 am
1.)y-0=-4(x-0)
y-0=-4(x-0)
0=-4y-y
L: 4x + y = 0
2.) y-(-6)=3(x-0)
y+6=3x
0=3x-y-6
L: 3x - y - 6 = 0
3.)y-0=4分1(x-(-2))
y=1/4(x+2)
4y=x+2
0=x-4y+2
L: x - 4y + 2 = 0
y-0=-4(x-0)
0=-4y-y
L: 4x + y = 0
2.) y-(-6)=3(x-0)
y+6=3x
0=3x-y-6
L: 3x - y - 6 = 0
3.)y-0=4分1(x-(-2))
y=1/4(x+2)
4y=x+2
0=x-4y+2
L: x - 4y + 2 = 0
參考: myself
2009-09-07 4:14 am
Q1 and Q3 are correct. Q2 is wrong because 3(x - 0) = 3x, not 3x - 3.
2009-09-07 3:31 am
其實你做對曬
只係有d打錯字
1.)y-0=-4(x-0)
y-0=-4(x-0)
0=-4x-y x打做y
L: 4x+y-0=0
2.) y-(-6)=3(x-1) 1打做0
y+6=3x-3
6+3=3x-y
9=3x-y
L:3x-y-9=0
只係有d打錯字
1.)y-0=-4(x-0)
y-0=-4(x-0)
0=-4x-y x打做y
L: 4x+y-0=0
2.) y-(-6)=3(x-1) 1打做0
y+6=3x-3
6+3=3x-y
9=3x-y
L:3x-y-9=0
收錄日期: 2021-04-25 22:37:27
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https://hk.answers.yahoo.com/question/index?qid=20090906000051KK01605