Expression 7: "y" equals "M" times left parenthesis, "R" Subscript, 0 , Baseline plus StartFraction, "x" Over "U" Subscript, "T" , Baseline , EndFraction "R" Subscript, 1 , Baseline , right parenthesis left brace, "x" less than "U" Subscript, "T" , Baseline , right bracey=M·R0+xUTR1x<UT
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Expression 8: "y" equals "M" left parenthesis, "R" Subscript, 0 , Baseline plus "R" Subscript, 1 , Baseline plus StartFraction, left parenthesis, "x" minus "U" Subscript, "T" , Baseline , right parenthesis Over left parenthesis, 0.9 5 minus "U" Subscript, "T" , Baseline , right parenthesis , EndFraction "R" Subscript, 2 , Baseline , right parenthesis left brace, "U" Subscript, "T" , Baseline less than or equal to "x" less than 0.9 5 , right bracey=MR0+R1+x−UT0.95−UTR2UT≤x<0.95
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Expression 9: "y" equals "M" "R" Subscript, 0 , Baseline plus "M" "R" Subscript, 1 , Baseline plus "M" "R" Subscript, 2 , Baseline plus StartFraction, left parenthesis, "x" minus 0.9 5 , right parenthesis Over left parenthesis, 1 minus 0.9 5 , right parenthesis , EndFraction "R" Subscript, 3 , Baseline left brace, 0.9 5 less than or equal to "x" less than or equal to 1 , right bracey=MR0+MR1+MR2+x−0.951−0.95R30.95≤x≤1