∵f(x)的定义域是{x|x∈R且x≠0},
∴1-a<0,即a>1.
又∵f(x)在(-∞,0)上是增函数,在(0,+∞)上是减函数,故1-a为负偶数,
∴1-a=-2,即a=3,
故选D.
已知函数f(x)=x1−a3的定义域是非零实数,且在(-∞,0)上是增函数,在(0,+∞)上是减函数,则最小的自然数a等于( ) A.0 B.1 C.2 D.3
已知函数f(x)=x
的定义域是非零实数,且在(-∞,0)上是增函数,在(0,+∞)上是减函数,则最小的自然数a等于( )
A. 0
B. 1
C. 2
D. 3
1−a |
3 |
A. 0
B. 1
C. 2
D. 3
数学人气:311 ℃时间:2020-01-31 12:51:32
优质解答
我来回答
类似推荐
猜你喜欢
- 11um等于多少克
- 2Disneyland opened to the public and became the most successful amusement park in the USA 中文翻译
- 3记忆和回忆英语怎么说
- 4most people think bicycles are much safer than other vehicles
- 5函数f(x)=sin(23x+π2)+sin23x的图象中两条相邻的对称轴之间的距离是( ) A.3π B.6π C.32π D.34π
- 6炼铁的时候加碳就出钢,实际加的是什么碳呢?
- 7一道英语选择题:__to train his daughter in English,he put an ad like this in the paper,"___,an ...
- 89/0.125用简便方法计算
- 9关于x,y的多项式4xy|k|−1/5(k+2)y2+1能是三次三项式吗?若能,求出k的值.
- 10在数列{An}中,已知a1=1,1/a(n+1)=1/an+1/3 (n∈N*),求a50...