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=|x2-1|的圖象和性質(zhì)進(jìn)行探究,過程如下,請(qǐng)你補(bǔ)充完整.
(1)函數(shù)y=|x2-1|的自變量x的取值范圍是 x取任意實(shí)數(shù)x取任意實(shí)數(shù);
(2)①列表:下表是x,y的幾組對(duì)應(yīng)值,其中m=3434,n=3434;
3
4
3
4
3
4
3
4
x | … | -2 | - 3 2 |
-1 | - 1 2 |
0 | 1 2 |
1 | 3 2 |
2 | … |
y | … | 3 | 5 4 |
0 | m | 0 | n | 0 | 5 4 |
3 | … |
1
2
1
2
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
B
B
.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
a<b
a<b
.【答案】x取任意實(shí)數(shù);;;B;a<b
3
4
3
4
【解答】
【點(diǎn)評(píng)】
聲明:本試題解析著作權(quán)屬菁優(yōu)網(wǎng)所有,未經(jīng)書面同意,不得復(fù)制發(fā)布。
發(fā)布:2024/8/16 2:0:0組卷:213引用:3難度:0.4
相似題
-
1.已知二次函數(shù)y=(x+m-3)(x-m)+3,點(diǎn)A(x1,y1),B(x2,y2)(x1<x2)是其圖象上兩點(diǎn)( ?。?/h2>
發(fā)布:2025/6/10 7:0:1組卷:909引用:4難度:0.5 -
2.已知二次函數(shù)y=-2(x-1)(x-m+3)(m為常數(shù)),則下列結(jié)論正確的有 .
①拋物線開口向下;
②拋物線與y軸交點(diǎn)坐標(biāo)為(0,-2m+6);
③當(dāng)x<1時(shí),y隨x增大而增大;
④拋物線的頂點(diǎn)坐標(biāo)為.(m-22,(m-4)22)發(fā)布:2025/6/10 5:0:1組卷:297引用:2難度:0.6 -
3.拋物線y=-3(x+5)2+4的頂點(diǎn)坐標(biāo)是( )
發(fā)布:2025/6/10 11:30:1組卷:127引用:2難度:0.7