人教A版(2019)必修第一冊(cè)《3.3 冪函數(shù)》2023年同步練習(xí)卷(13)
發(fā)布:2024/8/15 15:0:1
一、選擇題
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1.在函數(shù)①
,②y=3x3,③y=2x+1,④y=1,⑤y=x3,⑥y=1x中,是冪函數(shù)的是( ?。?/h2>y=x-12A.①②④⑤ B.①⑤⑥ C.①②⑥ D.①②④⑤⑥ 組卷:269引用:3難度:0.7 -
2.冪函數(shù)f(x)=xα的圖象經(jīng)過(guò)點(diǎn)
,則f(3)=( ?。?/h2>(2,12)A. 13B. -13C.3 D.-3 組卷:148引用:5難度:0.8 -
3.已知冪函數(shù)f(x)=(m2-2m-2)
在(0,+∞)上是減函數(shù),則f(m)的值為( ?。?/h2>xm2+m-2A.3 B.1 C.-3 D.-1 組卷:234引用:2難度:0.8
三、解答題
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9.已知冪函數(shù)y=f(x)的圖象過(guò)點(diǎn)(9,3).
(1)試求出此函數(shù)的解析式;
(2)判斷此函數(shù)的奇偶性并證明.組卷:29引用:2難度:0.7 -
10.已知冪函數(shù)f(x)=(m-1)2?x2m-1在(0,+∞)上單調(diào)遞增.
(1)求f(x)的值域;
(2)若?x>0,,求a的取值范圍.f(x)x2≥2-a2x組卷:195引用:6難度:0.7