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美国微积分的三道题目求解答,13的c 15的a.b 和16

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美国微积分的三道题目求解答,13的c 15的a.b 和16
13的c 15的a.b 和16,
13.a)find the slope of the line between the points(-3.5) and (6.23)
b)Find the equation of the line between the points in part a)
c) What is the slop of the line perpendicular to the line in part
15.The equation of a line is given by y=KX-5
b)For the line given(not using the slope in part a) find the equation of the line perpendicular through the point(0.7).
c)For the given line,find the equation of the line parallel through the point(3.6).
16)A line has slope -2 and an x-intercept of(10.0).A second line is perpendicular to the first and has an x-intercept of (-4,0).The lines intersect at the point(a.b).Find the value of a and the value of b
13的c 两条互相垂直的直线斜率的乘积是-1