Expression 4: negative "f" left parenthesis, "x" , right parenthesis sine left parenthesis, 22 "k" left parenthesis, "x" minus "c" , right parenthesis , right parenthesis times StartFraction, 0.3 6 2 plus 0.4 8 1 Over 2 times 0.4 8 1 , EndFraction minus StartFraction, 0.4 8 1 minus 0.3 6 2 Over 2 , EndFraction left brace, StartAbsoluteValue, "x" , EndAbsoluteValue less than 0.5 0 4 , right brace Has graph. To audio trace, press ALT+T.−fxsin22kx−c·0.362+0.4812·0.481−0.481−0.3622x<0.504
4
Expression 5: "f" left parenthesis, "x" , right parenthesis equals StartFraction, 0.4 8 1 plus 0.4 8 1 Over 1 plus "e" Superscript, 50 left parenthesis, "x" minus 0.1 9 8 , right parenthesis , Baseline , EndFraction minus 0.4 8 1fx=0.481+0.4811+e50x−0.198−0.481