.


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, . VB.NET , ( ):

 

Do

' VB.NET (0 )

Until _

 

, . , .4.1

 

4.1

<>

<

<=

>

>=

 

Unicode. , », » ( ). aBCD CDE ( ), .

; Option Compare Text. Option Compare Binary ANSI. Option Compare Text , Windows.

Unti1 While ( ). ,

 

Do

' VB.NET (0 )

Loop Until X <> String.Empty

 

:

 

Do

' VB.NET (0 )

Loop While X = String.Empty

 

String.Empty "", . Whi1 Unti1 Do, ( ). :

 

Do While Text1.Text <> String.Empty

'

Loop

 

Or, Not And. :

 

Do While count < 20 And savings < 1000000

 

For-Each

0 UBound(), For-Each. For-Each :

 

For Each In

[]

[Exit For ]

[] Next

 

For-Each , . Microsoft , For-Each For-Next.

,

 

Dim people={Tom,Ivan,Dona}

Dim person As String

For Each person In people

Console.WriteLine(person)

Next

1. n. ^n.

 

2. n.

1 1 1

+ +...+, n>=2

1*2 2*3 (n-1)*n

 

3. n.

(n-1)

1 (-1)

1- +...+

2 n

4. n.

 

1 1 1

1+ * 1 + *...* 1+

1^2 2^2 n^2

 

5. . .

 

6.

1 1 1

f = + +...+, i=0,1,...

i i^2+1 i^2+2 i^2+i+1

 

f * f *...* f. n - .

0 1 n

 

7. V -

 

h u(n)

V= [a(3r^2 - a^2) + 3r^2*(b-r) ].

3b 180

 

V u, a,b r , u u(1) u(2) /\ u.

 

8.

 

0,95*(sin(x))^3

y =

1+0,95*x^2

x 0 12 /\=0.2.

 

9. v. t(1), , v(1), t(2), . S. v(1) 0 15 /. /\v(1) =0.5 /.

 

10. , (1)% , - (2)%, -x(3)%,..., n- - (n)%. S n , [] .

 

11. y =0; 0.1; 0.2;...;10.

 

 

x-1

, x<=1

y = 2*x^2+3

 

1.05*(x-1)^2, x>1.

 

12. y=0.5+sin(5x), 0 2 /\=/6.

 

13.

 


1

===, 0<y<1.36; /\y=0.136;

\/1+y

z = 0, y=0;

1

====, -1.5<y<0; /\y=0.15.

\/1-2y

 

14. =RC, R - . , R 10^2 R(0)=10^3 /\R=10^2 .

 

15. W(k)=m*v^2/2, m - , v - . W(k) m v, v(1) v(2) /\v. m(1) m(2) /\m.

 

16. x=a*sin(k*t+2)*cos(k*t). , 5 7 0.12, t 4.2 6.2 0.17 k=1,2,3,...,12.

 

17. 2*x-3*sin(x)=0.

 

18. y=-2*x^2+3*x+1.5. y 0.1<=<=1 /\=0.01.

 

19. - 8 . 17 ., 12 13 . 30 . Q, - , Q(1) [/].

 

20. y(1)=x^3 y(2)=sin(x). >0. .

 

21. n K[n]. S K[n].

 

22. K. . ( a[n]...a[2] a[1] a[0]; a[0]+a[1]+a[2]+...+a[n]).

 

23. a,h, n. :

f(a) + f(a+h)+f(a+2h)+...+ f(a+nh), f(x)=(x^2+ 1)/x.

 

24. n, x. :

Y=sinx+sin^2x+...+sin^2x.

 

25. n. ?

 

26. n. n.

 

27. K. ?

 

28. x. :

s=(x-2)+(x-4)+(x-8)+...+(x-64);

p=(x-1)*(x-3)*(x-7)...(x-63).

 

29. x, a, i. :

((...((x+a)^2 +a)^2 +...+a)^2 +a)^2 +a, (0<a<_91_0).

 

30. x. :

x-x^3/3!+ x^5/5!-x^7/7!+x^9/9!-x^11/11!+x^13/13!

 

 



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