表达式6: left parenthesis, floor left parenthesis, 2 "N" "t" minus "N" , right parenthesis , negative .2 plus left parenthesis, "M" left parenthesis, floor left parenthesis, 2 "N" "t" minus "N" , right parenthesis , right parenthesis plus .2 , right parenthesis mod left parenthesis, 2 "N" "t" minus "N" , 1 , right parenthesis , right parenthesisfloor2Nt−N,−.2+Mfloor2Nt−N+.2mod2Nt−N,1
定义域t最小值： 00
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： 11
6
表达式7: left parenthesis, floor left parenthesis, 2 "N" "t" minus "N" , right parenthesis plus .0 5 times cos left parenthesis, 2 pi mod left parenthesis, 2 "N" "t" minus "N" , 1 , right parenthesis , right parenthesis , negative .2 plus left parenthesis, "M" left parenthesis, floor left parenthesis, 2 "N" "t" minus "N" , right parenthesis , right parenthesis plus .2 , right parenthesis plus .0 5sin left parenthesis, 2 pi mod left parenthesis, 2 "N" "t" minus "N" , 1 , right parenthesis , right parenthesis , right parenthesisfloor2Nt−N+.05·cos2πmod2Nt−N,1,−.2+Mfloor2Nt−N+.2+.05sin2πmod2Nt−N,1
定义域t最小值： 00
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： 11
7
表达式8: "N" equals 10N=10
11
2020
8
表达式9: "b" equals 1.7 7b=1.77
00
6.2 86.28
9
表达式10:
10
表达式11: "y" left parenthesis, "f" , right parenthesis equals Start sum from "n" equals 1 to "N" , end sum, sine left parenthesis, 2 pi "f" times "a" StartFraction, "n" Over "N" , EndFraction plus "b" , right parenthesis left brace, negative StartFraction, "N" Over 2 , EndFraction less than or equal to "f" less than or equal to StartFraction, "N" Over 2 , EndFraction , right braceyf=N∑n=1sin2πf·anN+b−N2≤f≤N2
11
表达式12: "y" left parenthesis, "l" , right parenthesis equals Start sum from "n" equals 1 to "N" , end sum, sine left parenthesis, StartFraction, 2 pi Over "l" , EndFraction times "a" StartFraction, "n" Over "N" , EndFraction plus "b" , right parenthesis left brace, 0 less than or equal to "l" less than or equal to 1 , right braceyl=N∑n=1sin2πl·anN+b0≤l≤1
