式3: "b" equals 0.1tangent 0.6 left parenthesis, "x" minus .3 6 , right parenthesis plus 12.9b=0.1tan0.6x−.36+12.9
3
式4: left bracket, "f" left parenthesis, "x" , right parenthesis , "f" left parenthesis, "x" , right parenthesis , "f" left parenthesis, "x" , right parenthesis , "f" left parenthesis, "x" , right parenthesis , right bracketfx,fx,fx,fx
4
式5: "c" equals 0.1tangent 0.6 left parenthesis, "x" plus 3 , right parenthesis plus 12.9c=0.1tan0.6x+3+12.9