Lab_4

’ – ++

© . .

= 4 > 7.

7.1.

I

m (m >5). "8 :

m

s = ∑(x2n + 5xn −1)

n=1

7.2.

I

m (m >5). "8 :

I

xn

, 7 8 ( + ( / ( i a

8+

( ( .

7.5.

I

a + xn

= xn−1(4* xn−3 + xn−2 ) ,

x1 = x2 = x3

=1. I 8 ! , 7 7+

a .

7.6.

I

a + xn

= xn−1(3* xn−3 + xn−2 ) ,

x1 =1, x2 = 8,x3

=1. I ( ! , 7 8 !

a .

7.7.

I +(+ !

n

+ :

xn = xn−1 + 3xn−2 + xn−3 (xn−1 − 4), x1 = x2 = x3 = 5.

7.8.

I

a + xn

= xn−1 + 2xn−2 , x1 = x2

= 4.

I +(+ ! n -

, + 7 ( + ( /

+( ( ( 8+ ( ( .

7.9.

I

a

+

xn = xn−1(3xn−3 − xn−2 ),

x1 =1, x2 = 8,x3

=1. I +(+ ! n

, 8 !

a .

7.10.

I

a

+

xn = 2xn−1 (2xn−3 − xn−2 ),

x1 = 2, x2 = 4, x3 = 4 . I +(+ !

n

,

7+

a .

7.11.

I

a

n - + 8 !

10* a :

xn = xn−1 + yn−1 + xn−3(xn−1 − yn−2 ), x1 = x2

= x3 = 0.5 ,

yn = yn−2 + xn−2 + xn−1(xn−3 − yn−3 ), y1 = y2 = y3 = 1.

7.12.

I m (m >5). "8 :

m

s = ∑(xn yn−1 +1)(xn−1 yn −1) .

n=1

I( xn yn

( n =

0,m

) 8 + ( ( :

3

2

sin(x),cos(x) > 0.

) f (x) = x tg(x +1),cos(x) > 0, 8)

f (x) = (x +1)

0,tg(x) <= 0.

x +1,cos(x) <= 0.

7.14.

I a, h +

n. "8

f( )+2f(a+h)+2f(a+2h)+...+2f(a+(n-1)h)+f(a+nh),

7.15.

I a, h +

n. "8 f( )+ f(a+ h – h/8)

+ f(a+ h + h/8) + f(a+ 2h – h/8) + f(a+ 2h + h/8)

+...+ f(a+ (n-1)h – h/8) + f(a+ (n-1)h + h/8)

+f(a+nh),