Expression 8: "R" equals left bracket, 0 , "k" ...1 , right bracketR=0,k...1
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Expression 9: left parenthesis, StartAbsoluteValue, "x" , EndAbsoluteValue Superscript, StartFraction, 2 Over "n" , EndFraction , Baseline plus StartAbsoluteValue, "y" , EndAbsoluteValue Superscript, StartFraction, 2 Over "n" , EndFraction , Baseline , right parenthesis Superscript, StartFraction, "n" Over 2 , EndFraction , Baseline equals "R"x2n+y2nn2=R
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Avoidance of Division by zero
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Expression 11: StartFraction, StartAbsoluteValue, "x" plus "y" , EndAbsoluteValue plus StartAbsoluteValue, "x" minus "y" , EndAbsoluteValue Over 2 , EndFraction equals "R"x+y+x−y2=R
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Expression 12: StartFraction, StartAbsoluteValue, "x" plus "y" , EndAbsoluteValue plus StartAbsoluteValue, "x" minus "y" , EndAbsoluteValue Over 2 , EndFraction equals "R" left bracket, length left parenthesis, "R" , right parenthesis , right bracketx+y+x−y2=RlengthR