表达式7: "d" equals StartFraction, round left parenthesis, distance left parenthesis, "C" , "A" , right parenthesis times 100 , right parenthesis Over 100 , EndFractiond=rounddistanceC,A·100100
equals=
55
7
${d} left parenthesis, 1 half left parenthesis, "a" plus "c" Subscript, "x" , Baseline , right parenthesis , 1 half left parenthesis, "b" plus "c" Subscript, "x" , Baseline , right parenthesis , right parenthesis12a+cx,12b+cx
标签:
equals=
left parenthesis, 4.0 2 5 , 2.9 7 , right parenthesis4.025,2.97
8
表达式9: left parenthesis, "c" Subscript, "x" , Baseline left parenthesis, 1 minus "t" , right parenthesis plus "a" "t" , "c" Subscript, "y" , Baseline left parenthesis, 1 minus "t" , right parenthesis plus "b" "t" , right parenthesiscx1−t+at,cy1−t+bt
00
定义域t最小值：
less than or equal to "t" less than or equal to≤t≤
