定义域为{x|x∈N*，1≤x≤12}的函数f（x）满足|f（x+1）﹣f（x）|=1（x=1，2，…11），且f（1），f（4），f（12）成等比数列，若f（1）=1，f（12）=4，则满足条件的不_刷题宝

题干

定义域为{x|x∈N^*，1≤x≤12}的函数f（x）满足|f（x+1）﹣f（x）|=1（x=1，2，…11），且f（1），f（4），f（12）成等比数列，若f（1）=1，f（12）=4，则满足条件的不同函数的个数为____．

上一题下一题 0.0难度选择题更新时间:2017-11-02 03:43:29

答案(点此获取答案解析）

176

同类题1

构成高等植物细胞的主要糖类是（　　）

同类题2

阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。

Confidence is very important in daily life. It is ____(use) to develop a healthy attitude(态度). If people are more confident, they are ____ happier. And they can have more chances to be ____ (success). Here are some suggestions to be more confident.

★ Speak loud. When you are not confident, you can't do well in ____ you want to do. Try to speak loud enough so that people can hear you ____ (clear). The high voice can help you become more confident.

★ Play sports. Physical exercise makes you tired but strong. A strong body helps you be full ____ confidence.

★ Encourage yourself. ____ (write) down a list of things you did during the day to see how many things you have done well. Give yourself praise(表扬) for the good things you have done.

★ Pick up a hobby. ____ you like singing, sing as much as you ____. In some ways, a hobby can make you excellent. And it will make you ____ (happy) and confident.

同类题3

饮酒驾驶属于违法行为，醉酒驾驶属于犯罪行为．我公安交警正在执法严查中如图所示，所使用的酒精浓度测试仪实际上是由酒精气体传感器（相当于随酒精气体浓度变化的变阻器）与一个定值电阻及一个电压表或电流表组成．右边是它的原理图，图中R₁为定值电阻，酒精气体传感器R₂的电阻值随酒精气体浓度的增大而减小，如果驾驶员呼出的酒精气体浓度越大，则（）

同类题4

蛋白质工程中直接需要进行操作的对象是（）

同类题5

______ interesting the book is! I want to buy one, too.

小学学科试题库

初中学科试题库

高中学科试题库