18
2. , , 250 ?
2- 250, :
Log2 
: 
.
4. һ , .
:
N=7
I=log27 
2,8
1) p=1/7 0,143
2) =2/7 0,29
3) p=1/7 0,143
4) p=1/7 0,143
5) p=1/7 0,143
6) p=1/7 0,143
7) i=log2(1/0,143) 
2,8
8) i=log2(1/0,29) 1,79
9) i=log2(1/0,143) 2,8
10) i=log2(1/0,143) 2,8
11) i=log2(1/0,143) 2,8
12) i=log2(1/0,143) 2,8
I=1*2,8+2*1,79+1*2,8+1*2,8+1*2,8+1*2,8=17,58
H(
)=-(5*0,143*log2(0,143)+0,29*log2(0,29))=2,5
D= 
: 0,107.
5. ( ) 5 512000 /.
:
29=512
5=5×223
:82 .
6. =9,5(16),b=345,45(8). +b 16- .
:
9,5(16)=12×16+9×160+5×16-1=192+9+0,3125=201,3125(10)
345,45(8)=3×82+4×8+580+4×8-1+5×8-2=192+32+0,5+0,078125=229,57812(10)
201,3125+229,57812=430,89062(10)
430 16 0,89062×16=14,24992
416 26 16 0,24992×16=3,99872
16 1 0,99872×16=15,97951
10 3F
1
: 1,3F.
7. =63,45(16), b=24(8). -b 8- .
:
63,45(16)=6×162+12×6+3×160+4×16-1+5×16-2 =1536+192+192+3+0,25+0,01953125=1731,2695(10)
332,25(8)=192+24+2+0,25+0,078125=218,3281(10)
1731,295-218,3281=152,9559(10)
10 8-:
152 0 0,9669×8=7,7352
189 5 0,7352×8=5,8816
23 7 0,8816×8=7,0528
:750,757.
8. =31(16), b=24(8). a×b 2- .
:
31(16)=1100011010(2)
24(8)=10100(2)
× 10100
11111000001000 (2)
: 11111000001000 (2)
9. =0001000000010111(2).
0001(2)=1(10)
0000(2)=0(10)
0001(2)=1(10)
0111(2)=1+1×21+1×22=7(10)
:1017(10).
10. , =173(10) .
:
173(10)→(2)
173 1 10101101(2)
86 0 , 1 0, 0 1:
43 1 0000000010101101
21 1 : 0000000010101101
10 0
5 1
2 0
11. 1110110101100100(2).
1110110101100100(2)
1
0001001010011100
|
|
|
:
0001001010011100(2)=1×22+1×23+1×24+1×27+1×29+1×212= -4764
: -4764.
12. -122,35(10) .
:
13. UNICODE . : , , , .
:
88
88×2=176
:176.
14. 16- UNICODE. WINDOWS 1251. 140 . .
:
16=8+1120
8=1120
=140.
: 140.
15. , 300 ?
:
2n=300
n=9.
: 9.
Ũ
1
6
..
_______________2012 .
. 12-
..
_______________2012 .
2012.
