26.初三年級(jí)某班成立了數(shù)學(xué)學(xué)習(xí)興趣小組,該數(shù)學(xué)興趣小組對(duì)函數(shù)y=|x
2-1|的圖象和性質(zhì)進(jìn)行探究,過(guò)程如下,請(qǐng)你補(bǔ)充完整.
(1)函數(shù)y=|x
2-1|的自變量x的取值范圍是
;
(2)①列表:下表是x,y的幾組對(duì)應(yīng)值,其中m=
,n=
;
x |
… |
-2 |
- |
-1 |
- |
0 |
|
1 |
|
2 |
… |
y |
… |
3 |
|
0 |
m |
0 |
n |
0 |
|
3 |
… |
②描點(diǎn):根據(jù)表中的數(shù)值描點(diǎn)(x,y),請(qǐng)補(bǔ)充描出點(diǎn)(-
,m),(
,n);
③連線:用平滑的曲線順次連接各點(diǎn),請(qǐng)把圖象補(bǔ)充完整.
(3)下列關(guān)于該函數(shù)的說(shuō)法,錯(cuò)誤的是
.
A.函數(shù)圖象是軸對(duì)稱圖形;
B.當(dāng)x>0時(shí),函數(shù)值y隨自變量x的增大而增大;
C.函數(shù)值y都是非負(fù)數(shù);
D.若函數(shù)圖象經(jīng)過(guò)點(diǎn)(m,a)與(-m,b),則a=b;
(4)點(diǎn)(m,a)與(n,b)在函數(shù)圖象上,且|n|<|m|<1,則a與b的大小關(guān)系是
.