四个变量y1,y2,y3,y4随变量x变化的数据如下表:x051015202530y151305051 1302 0

四个变量y1,y2,y3,y4随变量x变化的数据如下表:

x

0

5

10

15

20

25

30

y1

5

130

505

1 130

2 005

3 130

4 505

y2

5

94.478

1 785.23

3 733

6.37×105

1.2×107

2.28×108

y3

5

30

55

80

105

130

155

y4

5

2.310 7

1.429 5

1.140 7

1.046 1

1.015 1

1.005

    关于x呈指数型函数变化的变量是____________.

答案

解析:以爆炸式增长的变量是呈指数型函数变化的.从表格可以看出,四个变量y1,y2,y3,y4均是从5开始变化,变量y4越来越小,但是减小的速度很慢,则变量y4关于x不呈指数型函数变化;而变量y1,y2,y3都是越来越大,但是增大的速度不同,其中变量y2的增长最快,画出图像可知变量y2关于x呈指数型函数变化.

答案:

y2

相关题目

The day breaks,______ the birds are singing. A. because     B. as    
The day breaks,______ the birds are singing. A. because     B. as     C. since     D. for
________, what he has said _______ to be _______ as we haven’t investigated th
________, what he has said _______ to be _______ as we haven’t investigated the site yet. A. Obviously; remains; proved           `B. Fundamentally; is remained; balanced C. Traditionally;
He has moved to another city, but we write to each other      .      A
He has moved to another city, but we write to each other      .      A. day by day              B. arm in arm        C. side by side       D. from time to time 
Do you think that living a hungry life is last century’s story? Well, it may
Do you think that living a hungry life is last century’s story? Well, it may be this century’s headline. The world has growing worries about a global food shortage. Right now, there are still 8
已知是三个不同的平面,命题“∥且”是真命题,如果把中
已知是三个不同的平面,命题“∥且”是真命题,如果把中的任意两个换成直线,另一个保持不变,在所得的所有新命题中,真命题有(    )    A. 0
12. — I haven't seen Mr. White for weeks. — What _____ to him? A. must have
12. — I haven't seen Mr. White for weeks. — What _____ to him? A. must have happened                B. may have happened C. can have happened                  D. m
_______ you are alone at home, why don’t you go with us to the party? A Even
_______ you are alone at home, why don’t you go with us to the party? A Even though   B As though    C So that    D Now that
请阅读尼采的一首小诗,按要求作文。处世之道尼采别爬上
请阅读尼采的一首小诗,按要求作文。处世之道尼采别爬上山顶去,也别站在山脚,打从半高处看,这世界最美好。本诗表达的是尼采的一种人生观和

最新题目