2
(9)
9 h(m) t(
s) h30t5t2 ( )
A6 s B4 s C3 s D2 s
10 yax2bxc x y .
x 3 2 1 0 1
y 12 2 4 6 4
y (06) y
(30) x<0 yx
( )
A1B2C3D4
( 3 30 )
11 y2x2x3 ________ ______________
______________
12(2015 ) yx22x1 A(0 3)
________________
13 yax2bxc x3 4 x0 y
14 ________________
14 yax2bxc(a0)x (50)(20)
ax2bxc0(a0) ______________
15( ) yx22mx2 x2 y x
m ____________
16 ya(x1)(x9)x AB y C
ACB 90 a ________
17
y 1
4x2 AB 12 m O ________
