急F4 Equations of Straight Line

help

2011-09-10 11:09 pm

請詳細教我做以下幾條 :
用公式 L1 : y=m1x+c1 及 L2 : y=m2x=c2

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回答 (1)

匿名

2011-09-11 3:50 am

✔ 最佳答案

6. For both are deg 1,
L1 : y = 2x/5 + 7/5
L2 : y = 5x/2 + 1/2
Since m1 =/= m2 , therefore 1 intersection point

7. For both are deg 1,
L1 : y = 3x + 2
L2 : y = 3x - 1/2
Since m1 = m2, therefore they have no intersection point

8. For both are deg 1 and k=/= 0,
l1: y = -x/2 + 5/4k
l2 : y = -x/2 - k
Since m1=m2, therefore they have no intersection point as both equations are in parallel since 5/4k =/= -k

9. For both are deg 1 and k=/=0
L1 : y = (k+1)x/k + 3/k
L2 : y = (k+1)x/k + 3/k
Since m1 = m2, therefore they have infinite intersection point because they are the same equation.

參考: Hope the solution can help you^^”

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