表达式4: "f" Subscript, 0 , Baseline left parenthesis, "t" , right parenthesis equals 2 left parenthesis, "t" minus 1 half , right parenthesis left parenthesis, "t" minus 1 , right parenthesisf0t=2t−12t−1
4
表达式5: "f" Subscript, 05 , Baseline left parenthesis, "t" , right parenthesis equals 4 "t" left parenthesis, 1 minus "t" , right parenthesisf05t=4t1−t
5
表达式6: "f" Subscript, 1 , Baseline left parenthesis, "t" , right parenthesis equals 2 "t" left parenthesis, "t" minus 1 half , right parenthesisf1t=2tt−12
6
表达式7: "A" times "f" Subscript, 0 , Baseline left parenthesis, "t" , right parenthesis plus "B" times "f" Subscript, 05 , Baseline left parenthesis, "t" , right parenthesis plus "C" times "f" Subscript, 1 , Baseline left parenthesis, "t" , right parenthesisA·f0t+B·f05t+C·f1t
