.


:




:

































 

 

 

 





.

¯ , . , =F7>($F$7:$F$21) , F , F7:F21. . , .

¯ , . () (, > 70).

, , :

¯ ;

¯ ;

¯ ;

¯ ;

¯ , , ;

¯ , , ;

¯ ;

¯ .

, , .

. , , . .

( ) (.9). , . , , , . , 50., , 50.

 

 

.9

, (.10). (, , .), . , . , , . , .

10. , .

, , .

 

.10

 

, (.11). , , . :

 

.11

, , ;

;

, , , ;

, , ;

, , , ; , ;

, , . , , , .

:

¯ ;

¯ , ;

¯ , , ;

¯ , , , ;

¯ , , .

, .

 

, . , , , , . , , .

:

¯ , , , , ;

¯ ;

¯ , ;

¯ >;

¯ , ;

¯ (4-) .

 

. . . , , Delete.

 

 

1.

 

y=f(x) [a,b] h.

.

y=cos x + e

.

 

1. 1 1 .

2. 1, D1 E1 , b .

3. 2, D2 E2 a,b , ,

a=1 b=5 =0,5

4. 2 =$C$2

5. 3 =A2+$E$2

6. x=5

7. B2 =(COS(A2^4))^5+EXP(2*A2)

8. .

 

 

 

.12

 

9. A2:B10.

10.

11. .

12. , OX OY. . .13

 

 

 

.13

 

 

, ; , .

(_1; _2;...)

_1, _2,... 1 30 , , .

 

 

, ; , .

(_1;_2;...)

_1, _2,... 1 30 , ,

. , , .

(_)

_ , : .

, , , .

(_; __;__)

_ , . , , .

 

 

. , , B1, C1, D1, E1, . Microsoft Excel { }, .

:

¯ , (.14);

¯ , -;

¯ Ctrl+Shift+Enter.

:

¯ , ;

¯ ;

¯ Ctrl+Shift+Enter.

 

.14

2.

 

y=f(x), 2- :

 
 


x +3, x£-6

y= x +lnx, 0<x£2

x +1, x>2

 

:

y= x +3 -6 0 y= x +lnx 2 y= x +1

-6 0 .

x

x -6

y= x +3

y

x 0

x 2

y= x +lnx

y

y= x +1

Excel:

1. 1 1 .

2. 2:A10 , ..

(-∞;-6], (-6;0], (0;2], (2,+∞) 2-3 .

3. F2 .

4. 2 :

 

=(A2<=-6;-A2^2+3;(A2<=0;$F$2;(A2<=2;A2^2+LN(A2);A2^2+1)))

:

 

 

2.

z=f(x,y), .

Z = +lnxy

: x-y≥0 x-5≠0 xy>0

x,y

x-5≠0

x-y≥0

xy>0

Z = +lnxy

y

Excel:

1. 1, 1,1 z .

2. 2:A10, B2:10 y .

3. F1 .

4. F2 .

5. F3 .

6. 2 :

 

=(A2-5<>0;(A2-B2>=0;(A2*B2>0;(A2-B2)^0,5/(A2-5)+LN(A2*B2);$F$1);$F$2);$F$3)

 

3.

. :

) ()

)

)

(.) :

()-

.

, .

A1:C3, , :

(A1:C3)
A1*(B2*C3-B3*C2) + A2*(B3*C1-B1*C3) + A3*(B1*C2-B2*1)

()

, . , , . , , 1, 0. , :

, Excel () ().

(1; 2)

( ). , 1 , 2. 1 , 2, .

 

:

.

13x - 12x - 14x + 18x = 39

7x + 17x + 3x + 6x = 60,6

12x + 16x + 8x + 4x = 59,2

2x - x - 3x + 6x = 7,4

.

, Δ

Δx -

1. Excel , :

 

 

2. 4 44 1- , 2- , 3- , 4 -.

:

 
 

 

 


3. 1: 5 :

 

 

4. I1: I5 :

 

 

5. 7: 10 : x1=,x2=,x3=,x4=

I7: I10 :

 

.

 

:

, - ,

- .

 

1. Excel , :

 

 

2. :

6 : = (A1:A4)

c A6:D9, CTRL+SHIFT+ENTER .

 

 

3. 1: 4 : x1=,x2=,x3=,x4=

H5: H9

 

 

 

, -. , . , . , , , . , , . .

:

1. .

2. - .

3. .

1 :

 

 

2 :

 

 

3 :

 

 

:

 

.

4.

 

:

_

1. >3000 <10000

2. , 30.10.05

 

 

1.

2. .

3. .

 

4.

(// )

 

 

:

 

 

: , .

:

_
* >30.10.05

 

 

1

 

(, )

Y=f(x) Excel [a,b] c h ( ).

 

:

 

1.y=cos x-2ln cos x 13.y==5sin x e+

2.y=6*ln 14.y=arccos x -e+

3. y=(2-x)cos x -e+ 15.y==(9+x)ctg x -e+

4.y=ln(x+ ) 16.y=(10-x)sin x -e+ 5.y=3 17.y=6+tg

6.y=(1+x )arctgx 18.y=9*tg

 

7.y=arcsin(1-x)+ 19.y=6x+cos

8.y=arccos (x)-x +tg x 20.y= sin(x+ )

9.y=arcsin (x)+x +ln x 21.y= tg(x+5+ )

10.y=cos (x)-sinx +arctg x 22.y= sin (1-x )+

 

11.y=sin (x)+x +ctg x 23.y== cos (1+x )+

 

12.y==(2-x)cos x -e + cosx 24.y== ctg (1-x )+

25.y==ln (1-x )+

 

2

z=f(x,y), .

 

1.z=arcsin(x+y) 13.z=

2.z=sin 14.z=

3.z=lnx+lny 15.z=arccosx+9y

4.z= 16.z=

5.z=arccos(xy) 17.z=

6.z=tg 18.z=

7.z=lnx-4lny 19.z=arccosy+lnx

8.z= 20.z=

9.z= 21.z=sin

10.z=arccos(x y) 22.z=

11.z=ctg 23.z= +lny

12.z=lnx+lnxy 24.z=arcsinxy+lny

25.z= 26.z=

3

: )

)

) /

1. 12x + x + 7x + 14x = 43,4

x - 13x - 4x - 8x = 25,2

3x + 16x + 7x + 6x = 23,4

9x - x + 5x + 4x = 29,8

 

2. 13x - 12x - 14x + 18x = 39

7x + 17x + 3x + 6x = 60,6

12x + 16x + 8x + 4x = 59,2

2x - x - 3x + 6x = 7,4

 

3. 6x + 4x + 3x = 36

2x + x + 3x = 22

10x + 5x + 8x = 80

2x + 6x + 3x = 45

 

4. 24x + 27x - 14x + 18x = 18,3

15x - 11x + 3x + 6x = 5

13x - 19x + 8x + 4x = 106

8x + 25x - 3x + 6x = 82,2

 

5. x - 3x - 45x + 2x = 36

49x + 60x - 3x - 2x = 68

59x - 42x - 95x = 65

48x + 2x + x - x = 21

 

6. 7x - 12x + 4x + 2x = -8,8

3x + 21x + 8x + 5x = 23,7

x + 7x - 14x + 18x = -3

21x + 4x + 32x + 11x = 30,1

 

7. 21,6x - 3,2x + 86,4x - 4,8x = 1113

44,8x - 5,6x + 67,2x - 6,4x = 1125

67,2x - 6,4x + 44,8x - 5,6x = 1136

86,4x - 4,8x + 21,6x - 3,2x = 1147

8. 3x - 4x + 5x = 13

3x - x = 5

7x - 8x - 4x = 21

3x + 10x - 4x = 4

 

9. 4x + 0,24x - 0,08x + 0,16x = 8

0,09x + 3x - 0,15x - 0,12x = 9

0,04x - 0,08x + 4x + 0,06x = 20

0,02x + 0,06x + 0,04x - 10x = 1

 

10. x - 5x - x + 3x = -5

2x + 3x + x - x = 4

3x - 2x + 3x + 4x = -1

5x + 3x + 2x + 2x = 0

 

11. 10,9x + 1,2x + 2,1x + 0,9x = -7

1,2x + 11,2x + 1,5x + 2,5x = 5,3

2,1x + 1,5x + 9,8x + 1,3x = 10,3

0,9x + 2,5x + 1,3x + 12,1x = 24,6

 

12. 0,88x - 0,23x + 0,25x - 0,16x = -1,24

0,14x - 0,66x - 0,18x + 0,24x = 0,89

0,33x + 0,03x - 0,54x - 0,32x = -1,15

0,12x - 0,05x - 0,85x = 0,57

 

13. 20,9x + 1,2x + 2,1x + 0,9x = 21,7

1,2x + 21,2x + 1,5x + 2,5x = 27,46

2,1x + 1,5x + 19,7x + 1,3x = 28,76

0,9x + 2,5x + 1,3x + 32,1x = 49,72

 

14. 4x + 4x + 5x + 5x = 0

2x + 3x - x = 10

x + x - 5x = -10

3x + 2x = 1

 

15. 2x - x + 3x + 2x = 4

3x + 3x + 3x + 2x = 6

3x - x - x - 2x = 6

3x - x + 3x - x = 6

16. 2x + 2x - x + x = 4

4x + 3x - x + 2x = 6

8x + 5x - 3x + 4x = 12

3x + 3x - 2x + 2x = 6

 

17. 2x + 5x + 4x + x = 20

x + 3x + 2x + x = 11

2x + 10x + 9x + 9x = 40

3x + 8x + 9x + 2x = 0

 

18. 3x + 5x + 3x + 5x = -6

3x + 4x + x + 2x = -3

6x + 8x + x + 5x = -8

3x + 5x + 3x + 7x = -8

 

19. 3x - 2x - 5x + x = 3

2x - 3x + x + 5x = - 3

x + 2x - 4x = - 3

x - x - 4x + 9x = 22

 

20. x + x - 6x - 4x = 6

3x - x - 6x - 4x = 2

2x + 3x + 9x + 2x = 6

3x + 2x





:


: 2016-11-24; !; : 567 |


:

:

, .
==> ...

1503 - | 1357 -


© 2015-2024 lektsii.org - -

: 0.248 .