中点 (2.5,4.6),(9.5,1.6)

解答

中点

(2.5, 4.6), (9.5, 1.6)

(6, 3.1)

求解步骤

(x_{1}, y_{1}), (x_{2}, y_{2})

的中点:

(\frac{x _{2} + x _{1}}{2}, \frac{y _{2} + y _{1}}{2})

(x_{1}, y_{1}) = (2.5, 4.6), (x_{2}, y_{2}) = (9.5, 1.6)

= (\frac{9.5 + 2.5}{2}, \frac{1.6 + 4.6}{2})

整理后得

= (6, 3.1)

s l o p e in t erce pt x - y = - 8

d o main f (x) = 9 - x^{2} - x^{2} - 4

d o main 3 x - 2

in t erce pt s f (x) = x^{2} + y = 16

mi d p o in t (- 2, - 5), (- 4, 3)