LXXX+2)(x+1)(X-5)-(2x+3)(x+2)(x+1)(X-5) = 0
=>(+2)X+1)(x5) [22-2X-3]{0
=> (x+2) LX+1)(x-5) [X-3) = 0
{(x+2)(x-3)(x-3350
X
x+2
6
如右圖,三次函數f(x)=ax^+ bx + ex+d的圖形通過(0,0),(1,0)與(2,0)-
2
三點,選出所有正確的選項。
X
(1) a > 0
(2) b > 0
(3) c> o
(4) d > 0
O
X
1
2.
(5) a + b +c+d > 0.
是