수식 13: "a" equals "B" Subscript, 1 , Baseline minus "A" Subscript, 1 , Baselinea=B1−A1
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수식 14: "b" equals "B" Subscript, 2 , Baseline minus "A" Subscript, 2 , Baselineb=B2−A2
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수식 15: "v" Subscript, "l" , Baseline equals StartRoot, "a" squared plus "b" squared , EndRootvl=a2+b2
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수식 16: left parenthesis, "A" Subscript, 1 , Baseline plus "a" "t" , "A" Subscript, 2 , Baseline plus "b" "t" left brace, "C" equals 0 , right brace , right parenthesisA1+at,A2+btC=0
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수식 17: left parenthesis, "A" Subscript, 1 , Baseline plus left parenthesis, "B" Subscript, 1 , Baseline minus StartFraction, "a" "A" Subscript, "l" , Baseline Over "v" Subscript, "l" , Baseline , EndFraction minus "A" Subscript, 1 , Baseline , right parenthesis "t" , "A" Subscript, 2 , Baseline plus left parenthesis, "B" Subscript, 2 , Baseline minus StartFraction, "b" "A" Subscript, "l" , Baseline Over "v" Subscript, "l" , Baseline , EndFraction minus "A" Subscript, 2 , Baseline , right parenthesis "t" left brace, "C" equals 1 , right brace , right parenthesisA1+B1−aAlvl−A1t,A2+B2−bAlvl−A2tC=1
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수식 18: left parenthesis, "B" Subscript, 1 , Baseline minus StartFraction, "a" "A" Subscript, "l" , Baseline Over "v" Subscript, "l" , Baseline , EndFraction minus StartFraction, left bracket, negative 1 , 1 , right bracket "b" "A" Subscript, "l" , Baseline "A" Subscript, "w" , Baseline Over "v" Subscript, "l" , Baseline , EndFraction "t" , "B" Subscript, 2 , Baseline minus StartFraction, "b" "A" Subscript, "l" , Baseline Over "v" Subscript, "l" , Baseline , EndFraction plus StartFraction, left bracket, negative 1 , 1 , right bracket "a" "A" Subscript, "l" , Baseline "A" Subscript, "w" , Baseline Over "v" Subscript, "l" , Baseline , EndFraction "t" left brace, "C" equals 1 , right brace , right parenthesisB1−aAlvl−−1,1bAlAwvlt,B2−bAlvl+−1,1aAlAwvltC=1
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수식 19: left parenthesis, "B" Subscript, 1 , Baseline plus left parenthesis, negative StartFraction, "A" Subscript, "l" , Baseline left parenthesis, "a" plus left bracket, "b" "A" Subscript, "w" , Baseline , negative "b" "A" Subscript, "w" , Baseline , right bracket , right parenthesis Over "v" Subscript, "l" , Baseline , EndFraction , right parenthesis "t" , "B" Subscript, 2 , Baseline plus left parenthesis, negative StartFraction, "A" Subscript, "l" , Baseline left parenthesis, "b" plus left bracket, negative "a" "A" Subscript, "w" , Baseline , "a" "A" Subscript, "w" , Baseline , right bracket , right parenthesis Over "v" Subscript, "l" , Baseline , EndFraction , right parenthesis "t" , right parenthesisB1+−Ala+bAw,−bAwvlt,B2+−Alb+−aAw,aAwvlt