问题描述:
1,P is the point (7,5) and L1 is the line with equation 3x+4y=16
(1),Find out the equation of the line L2 which passes through P and is perpendicular to L2.
(2),Find the point of intersection of the L1 and L2.
(3),Find the perpendicular distance of P from the line L1.
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可怜小妹的数学初中水平还不够,看来勘定英文是不够的!555555555555555555555555
还有一个公式:gradient =y-step/x-step=1/-m
给出3个点的坐标,如何证明他们形成的角是直角?(use m1m2=-1 to explain it)
(1),Find out the equation of the line L2 which passes through P and is perpendicular to L2.
(2),Find the point of intersection of the L1 and L2.
(3),Find the perpendicular distance of P from the line L1.
------------------------------------------------
可怜小妹的数学初中水平还不够,看来勘定英文是不够的!555555555555555555555555
还有一个公式:gradient =y-step/x-step=1/-m
给出3个点的坐标,如何证明他们形成的角是直角?(use m1m2=-1 to explain it)
问题解答:
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