优课网
首页
数学
语文
英语
化学
物理
政治
历史
生物
首页
> (8分)函数的图象如图所示.(1)()是第一象限内图象上的点,且都是整数.求出所有的点;(2)若P(m,y1),Q(-3,y2)是函数图象上的两点,且y1>y2,求实数m的取值范围.-八年级数学
(8分)函数的图象如图所示.(1)()是第一象限内图象上的点,且都是整数.求出所有的点;(2)若P(m,y1),Q(-3,y2)是函数图象上的两点,且y1>y2,求实数m的取值范围.-八年级数学
题目简介
(8分)函数的图象如图所示.(1)()是第一象限内图象上的点,且都是整数.求出所有的点;(2)若P(m,y1),Q(-3,y2)是函数图象上的两点,且y1>y2,求实数m的取值范围.-八年级数学
题目详情
(8分)函数
的图象如图所示.
(1)
(
)是第一象限内图象上的点,且
都是整数.求出所有的点
;
(2)若P(m,y
1
),Q(-3,y
2
)是函数
图象上的两点,且y
1
> y
2
,求实数m的取值范围.
题型:解答题
难度:中档
来源:不详
答案
解:(1)因为
是第一象限内的图象上点,且
都是整数.
所以x只能取1,2,3,6.………………………………………1分
当x=1时,y=6;当x=2时,y=3;当x=3时,y=2;当x=6时,y=1;………3分
所以所有的点分别为P1(1,6),P2(2,3),P3(3,2),P4(6,1)…4分
(2)当P(m,y1)在第一象限时,均有y1> y2,此时m>0,…………………… 5分
当P(m,y1)在第三象限时,当m<-3时有y1> y2,………………………7分
所以实数m的取值
范围为:m>0或m<-3。…………………………8分
略
上一篇 :
已知反比例函数y=(k≠0)的图象
下一篇 :
(2011•攀枝花)如图,已知反比例函
搜索答案
更多内容推荐
(2011广西梧州,20,6分)已知B(2,n)是正比例函数y=2x图象上的点.(1)求点B的坐标;(2)若某个反比例函数图象经过点B,求这个反比例函数的解析式.-八年级数学
(2011•毕节地区)一次函数y=kx+k(k≠0)和反比例函数在同一直角坐标系中的图象大致是()-八年级数学
已知点A、B分别是轴、轴上的动点,点C、D是某个函数图像上的点,当四边形ABCD(A、B、C、D各点依次排列)为正方形时,称这个正方形为此函数图像的伴侣正方形。例如:如图,正方-八年级数学
下列函数表达式中,属于反比例函数的是()A.y=x-1B.y=1xC.y=-2x2+1D.y=2x-数学
设函数y=(m-1)xm2-1,当m=______时,该函数是反比例函数.-数学
若y=(a+1)xa2-2是反比例函数,则a的取值为()A.1B.-lC.±lD.任意实数-数学
反比例函数的表达式为y=(m-1)xm2-2,则m=______.-数学
在y=-35x;y=-35x;y=1x+1;y=a+1x(a≠-1)四个函数中,为反比例函数的是______.-数学
甲乙两地相距s,汽车从甲地以v(千米/时)的速度开往乙地,所需时间是t(小时),则正确的是为()A.当t为定值时,s与v成反比例B.当v为定值时,s与t成反比例C.当s为定值时,v与t成-数学
若函数y=-1x3-m2是反比例函数,则m的值为()A.±2B.2C.±2D.2-数学
已知y与z成正比例,z与x成反比例,则y与x成______比例.-数学
下列函数中,是y关于x的反比例函数的是()A.y=x+2B.y=9xC.y=x2D.y=1x2-数学
下列函数是反比例函数的是()A.y=x3B.y=6xC.y=x2+2xD.y=4x+8-数学
一个圆柱的侧面展开图是一个面积为4平方单位的矩形,那么这个圆柱的母线长L和底面半径r之间的函数关系是[]A.反比例函数B.正比例函数C.一次函数D.二次函数-八年级数学
下列各函数①、②、③、④、⑤、⑥、⑦和⑧y=3x-1中,是y关于x的反比例函数的有:()(填序号)。-八年级数学
形如(k是常数,且k≠0)的函数称为(),其中x是自变量的取值范围是(),y是函数,k是比例系数。-八年级数学
反比例函数y=-中,比例系数k=()。-九年级数学
Thelittleboystoodbeforetheshopwindow,______hiseyesonthetoybearinit.[ ] A.havingkeptB.keptC.beingkept
All the tasks___________ahead of time, they decided to go on holiday for a week. [ ]A. been fulfille
_____ in the queue for half an hour, Tom suddenly realized that he had left his wallet at home. [ ]A
____ in the city for thirty years, the old man moved back to the countryside.[ ]A. Having worked B.
At this moment the bell rang, ________ the end of class.[ ]A. announced B. having announcedC. announ
_______ any reply, he had to send a second request.[ ]A. Not to receive B. Having not received C. No
_____ a reply, he decided to write again. [ ]A. Not receiving B. Receiving notC. Not having received
_____ in the film The Water Margin as Song Jiang has helped actor Zhang Hang Yu gain more fans. [ ]A
_____ full preparations, we decided to put off the party till next week. [ ]A. We did not make B. Ha
In 2010, China enjoyed its best Winter Game results, ________ 11 medals in Vancouver-five goldinclud
The bell________the end of the period rang,________our heated discussion.[ ]A. indicating; interrupt
____ English for more than six years, he can speak and work very well with that businessman from Eng
__________for five years, they decided to hold thewedding. [ ]A. Having been in loveB. Having fallen
_____ many failures, I have the courage to meet all challenges. [ ]A. Having experienced B. To exper
The old couple often take a walk after supper in the park with their pet dog ________ them.[ ]A. to
______ at the party, we saw Ruth standing alone in the corner of the hall. [ ]A. ArrivingB. To arriv
Liu Xiang won the gold medal of men's 110m hurdles at the 16th Asian Games, ________ the title
Tony lent me the money, ________ that I'd do as much for him.[ ]A. hopingB. to hopeC. hopedD. h
With temperature ________ so rapidly,we could not go with the experiment. [ ]A. fallB. fallingC. fal
____ enough money, Jim was unable to buy his girlfriend expensive jewellery. [ ]A. Not to saveB. Not
______ a little money from her pocket money, Alice was able to buy her mother a lovely scarf. [ ] A.
_____ Class Two, our class became the Basketball Champion of our school. [ ]A. BeatingB. to beatC. B
_____ the danger of drunk driving, many drivers promised never to drive after drinking. [ ]A. Realiz
There was a noisethe sudden burst of light. [ ]A. followedB. followingC. to be followedD. being foll
So desperate ________ that no one could help another, each ________ to save himself and his animals.
Dina,____ for months to find a job as a waitress, finally took a position at a local advertising age
The thinker, head in hand, ________ his right arm on his left knee, gained its current title when___
With the final examination ________, we are busy going over what we've learnt this term.[ ]A. i
_____ warned of the danger of losing his way in the jungle, he still wanted to have an adventure.[ ]
— How did he break his head while swimming?— ______ my warnings, he dived straight into the shallow
_______an important decision more on emotion than on reason, you will regret it sooner or later.[ ]A
Little Tom admitted ________ in the shop, ________ that he wouldn't do that in future.[ ]A. to
_____the advantages against the disadvantages, I decided to take up the job as a clerk in the bank.
返回顶部
题目简介
(8分)函数的图象如图所示.(1)()是第一象限内图象上的点,且都是整数.求出所有的点;(2)若P(m,y1),Q(-3,y2)是函数图象上的两点,且y1>y2,求实数m的取值范围.-八年级数学
题目详情
(1)
(2)若P(m,y1),Q(-3,y2)是函数
答案
所以x只能取1,2,3,6.………………………………………1分
当x=1时,y=6;当x=2时,y=3;当x=3时,y=2;当x=6时,y=1;………3分
所以所有的点分别为P1(1,6),P2(2,3),P3(3,2),P4(6,1)…4分
(2)当P(m,y1)在第一象限时,均有y1> y2,此时m>0,…………………… 5分
当P(m,y1)在第三象限时,当m<-3时有y1> y2,………………………7分
所以实数m的取值