Expression 18: "f" left parenthesis, "x" , right parenthesis equals "m" Subscript, 1 , Baseline left parenthesis, "x" minus "C" Subscript, 1 , Baseline , right parenthesisfx=m1x−C1
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Expression 19: "g" left parenthesis, "x" , right parenthesis equals StartRoot, 1 squared minus "x" squared , EndRootgx=12−x2
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Expression 20: "f" left parenthesis, "B" Subscript, 1 , Baseline , right parenthesis tilde "g" left parenthesis, "B" Subscript, 1 , Baseline , right parenthesisfB1~gB1
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Expression 21: "B" Subscript, 2 , Baseline equals "m" Subscript, 1 , Baseline left parenthesis, "B" Subscript, 1 , Baseline minus "C" Subscript, 1 , Baseline , right parenthesisB2=m1B1−C1