中点 (3.2,2.5),(1.6,-4.5)

解答

中点

(3.2, 2.5), (1.6, - 4.5)

(2.4, - 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}) = (3.2, 2.5), (x_{2}, y_{2}) = (1.6, - 4.5)

= (\frac{1.6 + 3.2}{2}, \frac{- 4.5 + 2.5}{2})

整理后得

= (2.4, - 1)

d er i v a t i v e y = x^{s i n (x)}

p o l a r (2, 23)

d er i v a t i v e f (x) = x^{3} - x - 2

p a r a ll e l 5 x - y = 4, (2, 0)

s im pl i f y (- 1.4) (3.2)