Given three point A(1,2),B(5,-6)and C(11,k),if AB//BC,find the value of k
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Maths question.... Practices for TSA.
2008-03-27 3:50 am
回答 (2)
2008-03-27 4:48 am
✔ 最佳答案
slope of AB=[2-(-6)]/(5-1)=-8/4slope of BC=[k-(-6)]/(11-5)=(k+6)/6
slope of AB=slope of BC
-8/4=(k+6)/6
-48=4k+24
-72=4k
k=-18
所以k=-18
ps. TSA的mc...您可以sub 數 (ANS提供的) 入去 就可以找到了.
=]
參考: 在下
2008-03-27 3:54 am
slope of A&B =-4/8=-1/2
slope of B&C =-6/(-6-k)
since AB//BC,
-1/2=-6/(-6-k)
-6-k=2
k=-8
slope of B&C =-6/(-6-k)
since AB//BC,
-1/2=-6/(-6-k)
-6-k=2
k=-8
參考: me
收錄日期: 2021-04-21 14:09:04
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