수식 25: "t" Subscript, 1 , Baseline equals StartFraction, "a" Subscript, 2 , Baseline "C" Subscript, 1 , Baseline minus "a" Subscript, 2 , Baseline "A" Subscript, 1 , Baseline minus "a" Subscript, 1 , Baseline "C" Subscript, 2 , Baseline plus "a" Subscript, 1 , Baseline "A" Subscript, 2 , Baseline Over "a" Subscript, 1 , Baseline "b" Subscript, 2 , Baseline minus "a" Subscript, 2 , Baseline "b" Subscript, 1 , Baseline , EndFractiont1=a2C1−a2A1−a1C2+a1A2a1b2−a2b1
