Question

H

請問第13題的b怎麼算
離散數學第一章
第二張是答案可以參考～

b) X, 2-3, 3i 35
; 1<
13. In how many ways can we distribute eight identical white
balls into four distinct containers so that (a) no container is
left empty? (b) the fourth container has an odd number of balls
in it?
nansion of

8
35
(32
28.
8
=
2i
b) 512
i=1
1. a) (16) b) (3) c) (3)
3. (38)
5. a) 25 b) 2n
CE 41
7. a) (3)
)
b) (25) c) (5) d) 1
8
f) (28) -
9. n=7 11. a) (14) b) (15') + 3(1) +3() + ()
3
13. a) (6) b) :- (-21) 15. (23) (24!) 17. a) (12)
2i) 120
19. (23)
21. 24,310 = 21-i [for n= (13)]
()
23. a) Place one of the m identical objects into each of the n distinct containers. Th
identical objects to be placed into the n distinct containers, resulting in
n+ (m - n)-
(*+ * = * = 1) = (n = 1) = (% = ) distributions.
25. a) 29 b) 24
27. a) (3 +3 - 1) =4 b) 10 c) 48 d) (+4- )(+3 - ') +(3+2 - 1)(2+5
+
e) 180 f) 420
n
-
=
-
m-n
m-n
(+(2+3
(3+
.
12+5
=

離散數學

Answer 1

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C

(a)
a+b+c+d=8-4=4
答(7,4)
(b)
a+b+c=7,5,3,1
答(9,2)+(7,2)+(5,2)+(3,2)