Question

完美女孩

為什麼是g(x)=f(x-2)呢？
感謝🙏

1, f(x) = 2x² + 3x − 2 › g(x) = ax² + bx+c
若f(100) = g(102),f(101) = g(103),f(103) = g(105),則
(a¹b¹c)= (2,\}, }}) (2.-5.0)
f(100)-g(102) = 0
f(101) = g(103) = 0
f(103) - g(105) = 0
g(x)=f(x+2)
= 2(x+2) ³+3(x+2) = 2
=2x+bx+8+3x+6-2
= 2X² +11x+12
Ans: a=2 b=-5, c=0
9

P43
1. Ans (2,-5,0)
Sol
: =
degfix) ≤ 2, deg g(x) ≤ 26-6d5
& f(100) = g(102), f(101) = g(103), f(103) = g(105)
- g(x) = f(x-2) = 2(x-2)²+ 3(x-2)-2=2x²-5x
- (a,b,c) = (2₁-5,0)
-#

Answer 1

我就是我

三點可以決定一條二次曲線
因此g(x)必定是f(x)向右平移兩單位

完美女孩

因為是“向右平移”
所以要“-2”
醬嗎？
謝謝