中点 (-4,-3),(7,-5)

解答

中点

(- 4, - 3), (7, - 5)

(\frac{3}{2}, - 4)

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}) = (- 4, - 3), (x_{2}, y_{2}) = (7, - 5)

= (\frac{7 - 4}{2}, \frac{- 5 - 3}{2})

整理后得

= (\frac{3}{2}, - 4)

f (x) = ln (x - 5)

(- 7.5) (7.3)

(33, 3)

g (x) = \frac{( 3 x - 2 )}{( x ^{2} + 2 )}

x = - 5