This presentation is the property of its rightful owner.
Sponsored Links
1 / 56

1 . 什么叫一元一次方程 ? PowerPoint PPT Presentation


  • 622 Views
  • Uploaded on
  • Presentation posted in: General

新课导入. 1 . 什么叫一元一次方程 ?. 2 . 下列方程哪些是一元一次方程 ?. 一辆快客车和一辆中巴车在公路上行驶 , 已知快客车每小时比中巴车多行 20 千米 , 快客车行驶 80 千米所需要的时间与中巴车行驶 60 千米所需要的时间相同 , 求快客车的速度.. 解 : 设快客车每小时行驶 X 千米 , 则中巴车每小时行驶 (x - 20) 千米 , 根据题意可得方程 :. 怎样解这个方程?. 是一元一次方程吗?. 教学目标. 【 课程标准 】 1 .了解分式方程的概念 , 和产生增根的原因.

Download Presentation

1 . 什么叫一元一次方程 ?

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


1

1 ?

2 ?


1

,20,8060,

: X,(x20),:


1

1,

2

3

4


1


1

1

2

1

2


1

3 _________________

14x_________________

10x4

2,_____________

40x


1

,13025? x


1

15km,,1.50.5h

xkm/h,


1


1

fractional equation


1


1

6

2x2) (3x+2) 6

2x43x 26

2x43x 260

x12

x 12


1


1

15x

150.75x22.5

x10

:x10:

=

=1.5,

=1.5,

=

=

x10


1


1

xx1

30x25(x1)

x5

:x5:

=

=5,

=

=5,

=

x5


1

4(10x4)

4(410x)7(10x4)

x2

:x2:

=

=

=

x2


1


1

:

1

2

3


1


1

(x9) (x9)

x918

:x9x9x2810,x9

x9x918

x9


1

,

()


1

:,

:,,


1

00


1

:?

1 ?

2 a=bac=bc ?

3ac=bca=b ?


1

1

x3

2x12(x3),

x3

x3(x3) =3


1

1

2

(x2)

1(x1) 3(x2),

x2

x2(x2) 2


1

2

(x1)(x1)x1)2 =5x9

, x1=1, x2=8

:x1=1x2=8


1

x1=1, x1=1

x2=8, =, =

=, x2=8

x=8


1

xa

a

a


1

.

2x=15

1x=17


1


1

:x

;

;

= +500,:

3,500,9.6,10.2


1

:x,

x,

96000500x102000

,

x12

:x1x0, x1

:12


1

,500,9.6,10.2?

:

=


1

:x,

x(x500),

96000 (x500) 102000x

,

x8000

:x8000x(x500),0, x8000

:x+50080005008500()

80008500


1

411,m3,1215,2302125m3,?

:212= 5m3

=

=(1+)

,

=/


1

:x/m3,(1+1/3)x/m3,

x=1.5

x=1.5

:2/m3


1

5

v f)f

uvfuvfvu?


1

:

fvu,

,

:f,v,fv,

:fv

U


1

118021620

x,,

,

x100

x=100

x2010020120()

:100,120


1

243?

:x

,

x12

x=12

:12


1

319724

:x km/h,

,

x=5

,x=5

:4x4520(km/h)

:5/,

20/


1

:

1;

2;

3();

4();

5;

6


1

1

xa

a

a


1

2:

1;

2;

3();

4();

5;

6


1

1 x=2

m______

3


1

2

A0 B1 C 4 D 8

D

2


1

3 R1R2

R

D


1

4x

a

Aa>2 Ba0a2

Ca 2 Da2

D

2


1

5


1

x3,

6x, ?

:,

,

x3

x=3


1

:x/, /,

:(/)

7 A120B232.5

,

x16

,x=16

:16/,24/


1

880603/

:x/,,

,

x21

x=21

:21/


  • Login