The straight line passing through P(3,7) and Q(-1,k) will make an inclination of 45 degree. Find the value of k.
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maths
2007-02-12 6:03 am
回答 (1)
2007-02-12 6:08 am
✔ 最佳答案
The straight line passing through P(3,7) and Q(-1,k) will make an inclination of 45 degree. Find the value of k.tan45=slope of PQ
1=(k-7)/(-1-3)
k-7=-4
k=11
2007-02-11 22:08:26 補充：
k-7=-4k=3
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