It is known that the graph of ax - y + c = 0 passed through (0 , -6)
a) find the value of c.
b) if P(3 , 6) lies on the graph of ax - y + c = 0, find the value of a.
c) if Q(q , q)lies on the graph of ax - y + c = 0, find the coordinates of Q.
thanks you! lol
F.1 maths.
2008-04-26 9:32 pm
回答 (2)
2008-04-26 10:13 pm
✔ 最佳答案
a) put (0, -6) into ax - y + c = 0a(0) - (-6) + c = 0
0 + 6 + c = 0
c = -6
b) put P(3 ,6) and c=-6 into ax - y +c = 0
a(3) - 6 + (-6) = 0
3a - 12 = 0
3a = 12
a = 4
c) put Q (q, q) , a=4 and c = -6 in ax - y + c = 0
4q - q + (-6) = 0
3q -6 = 0
3q = 6
q = 2
therefore coordinates of Q is (2, 2)
參考: 自己計
2008-04-26 10:08 pm
a.sub(0,-6):6+c=0
c=-6
b.sub P into ax-y-6=0
3a-6-6=0
a=4
c.sub Q into 4x-y-6=0
4q-q-6=0
q=2
so Q=(2,2)
c=-6
b.sub P into ax-y-6=0
3a-6-6=0
a=4
c.sub Q into 4x-y-6=0
4q-q-6=0
q=2
so Q=(2,2)
參考: by myself
收錄日期: 2021-04-25 13:38:18
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080426000051KK01208