นิพจน์ 3: "y" equals Start sum from "n" equals 0 to "x" minus 1, end sum, .0 4 2 times StartFraction, nCr left parenthesis, 39 minus "x" , 5 , right parenthesis Over nCr left parenthesis, 39 , 5 , right parenthesis , EndFraction times StartFraction, nCr left parenthesis, "x" , "n" , right parenthesis times nCr left parenthesis, 34 minus "x" , 10 minus "n" , right parenthesis Over nCr left parenthesis, 34 , 10 , right parenthesis , EndFraction times left parenthesis, 1 minus StartFraction, nCr left parenthesis, 24 minus left parenthesis, "x" minus "n" , right parenthesis , 2 , right parenthesis Over nCr left parenthesis, 24 , 2 , right parenthesis , EndFraction , right parenthesisy=x−1∑n=0.042·nCr39−x,5nCr39,5·nCrx,n·nCr34−x,10−nnCr34,10·1−nCr24−x−n,2nCr24,2
3
"x"x
Start sum from "n" equals 0 to "x" minus 1, end sum, .0 4 2 times StartFraction, nCr left parenthesis, 39 minus "x" , 5 , right parenthesis Over nCr left parenthesis, 39 , 5 , right parenthesis , EndFraction times StartFraction, nCr left parenthesis, "x" , "n" , right parenthesis times nCr left parenthesis, 34 minus "x" , 10 minus "n" , right parenthesis Over nCr left parenthesis, 34 , 10 , right parenthesis , EndFraction times left parenthesis, 1 minus StartFraction, nCr left parenthesis, 24 minus left parenthesis, "x" minus "n" , right parenthesis , 2 , right parenthesis Over nCr left parenthesis, 24 , 2 , right parenthesis , EndFraction , right parenthesisx−1∑n=0.042·nCr39−x,5nCr39,5·nCrx,n·nCr34−x,10−nnCr34,10·1−nCr24−x−n,2nCr24,2
negative 2−2
r1c3:
negative 1−1
r2c3:
00
r3c3:
11
r4c3:
22
r5c3:
33
r6c3:
r7c3:
4
นิพจน์ 5: .3 3 7 times StartFraction, nCr left parenthesis, 40 minus "x" , 5 , right parenthesis Over nCr left parenthesis, 40 , 5 , right parenthesis , EndFraction times StartFraction, nCr left parenthesis, 35 minus "x" , 10 minus "x" , right parenthesis Over nCr left parenthesis, 35 , 10 , right parenthesis , EndFraction.337·nCr40−x,5nCr40,5·nCr35−x,10−xnCr35,10
