Expression 7: "j" left parenthesis, "x" , right parenthesis equals "f" left parenthesis, "x" , right parenthesis minus "h" left parenthesis, "x" , right parenthesis Has graph. To audio trace, press ALT+T.jx=fx−hx
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Expression 8: "w" left parenthesis, "x" , right parenthesis less than "y" less than "j" left parenthesis, "x" , right parenthesis Has graph. To audio trace, press ALT+T.wx<y<jx
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Expression 9: "l" left parenthesis, "x" , right parenthesis equals "x" squared minus "f" left parenthesis, "x" , right parenthesislx=x2−fx
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Expression 10: "d" left parenthesis, "x" , right parenthesis equals cosine "x"dx=cosx
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Expression 11: "y" equals 2 "x" minus "f" left parenthesis, "x" , right parenthesisy=2x−fx
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Expression 12: "w" left parenthesis, "x" , right parenthesis equals "h" left parenthesis, "x" , right parenthesis minus "f" left parenthesis, "x" , right parenthesis Has graph. To audio trace, press ALT+T.wx=hx−fx