<P>이현녀선생님의 답글입니다.</P> <P> </P> <DIV class=board> <P><FONT color=#0000ff>f(x,y)=0 의 그래프가 f(y, x-2)로 옮겨졌다.</FONT></P> <P><FONT color=#0000ff>어떻게 옮겼나요?</FONT></P> <P> </P> <P>위의 함수는 두 단계를 거쳤다고 생각하시면 됩니다. </P> <P>즉 합성함수라고 볼 수 있습니다.</P> <P>먼저 x 와 y 의 위치가 바뀌었으므로 </P> <P>i) <OBJECT class=MATH classid=clsid:70E4BF88-2729-4A46-8794-D459BAC0EB63 width=357 align=absMiddle height=18><PARAM NAME="_cx" VALUE="9445"><PARAM NAME="_cy" VALUE="476"><PARAM NAME="BackColor" VALUE="2097196"><PARAM NAME="Enabled" VALUE="-1"><PARAM NAME="Script" VALUE="[0]#wh4/81.6`4.3/12,[1]{f(x, y)`equal` 0 `arrow` f(y, x) `equal` 0 `arrow` f(y, x-2)`equal` 0}/{#xc333333}"><PARAM NAME="FontSize" VALUE="12"><PARAM NAME="FontColor" VALUE="3355443"><PARAM NAME="Editable" VALUE="0"><PARAM NAME="Measurable" VALUE="0"></OBJECT> 이거나</P> <P>ii) <OBJECT class=MATH classid=clsid:70E4BF88-2729-4A46-8794-D459BAC0EB63 width=384 align=absMiddle height=18><PARAM NAME="_cx" VALUE="10160"><PARAM NAME="_cy" VALUE="476"><PARAM NAME="BackColor" VALUE="2097196"><PARAM NAME="Enabled" VALUE="-1"><PARAM NAME="Script" VALUE="[0]#wh4/87.7`4.3/12,[1]{f(x, y)`equal` 0 `arrow` f(x, y-2) `equal` 0 `arrow` f(y, x-2)`equal` 0}/{#xc333333}"><PARAM NAME="FontSize" VALUE="12"><PARAM NAME="FontColor" VALUE="3355443"><PARAM NAME="Editable" VALUE="0"><PARAM NAME="Measurable" VALUE="0"></OBJECT></P> <P>i)은 함수 <OBJECT class=MATH classid=clsid:70E4BF88-2729-4A46-8794-D459BAC0EB63 width=82 align=absMiddle height=18><PARAM NAME="_cx" VALUE="2169"><PARAM NAME="_cy" VALUE="476"><PARAM NAME="BackColor" VALUE="3932222"><PARAM NAME="Enabled" VALUE="-1"><PARAM NAME="Script" VALUE="[0]#wh4/18.7`4.3/12,[1]{f(x, y)`equal`0}/{#xc333333}"><PARAM NAME="FontSize" VALUE="12"><PARAM NAME="FontColor" VALUE="3355443"><PARAM NAME="Editable" VALUE="0"><PARAM NAME="Measurable" VALUE="0"></OBJECT> 을 <OBJECT class=MATH classid=clsid:70E4BF88-2729-4A46-8794-D459BAC0EB63 width=42 align=absMiddle height=18><PARAM NAME="_cx" VALUE="1111"><PARAM NAME="_cy" VALUE="476"><PARAM NAME="BackColor" VALUE="3932222"><PARAM NAME="Enabled" VALUE="-1"><PARAM NAME="Script" VALUE="[0]#wh4/9.2`4.3/12,[1]{y`equal`x}/{#xc333333}"><PARAM NAME="FontSize" VALUE="12"><PARAM NAME="FontColor" VALUE="3355443"><PARAM NAME="Editable" VALUE="0"><PARAM NAME="Measurable" VALUE="0"></OBJECT> 에 대하여 대칭시킨면 역함수인 <OBJECT class=MATH classid=clsid:70E4BF88-2729-4A46-8794-D459BAC0EB63 width=82 align=absMiddle height=18><PARAM NAME="_cx" VALUE="2169"><PARAM NAME="_cy" VALUE="476"><PARAM NAME="BackColor" VALUE="3932222"><PARAM NAME="Enabled" VALUE="-1"><PARAM NAME="Script" VALUE="[0]#wh4/18.7`4.3/12,[1]{f(y, x)`equal`0}/{#xc333333}"><PARAM NAME="FontSize" VALUE="12"><PARAM NAME="FontColor" VALUE="3355443"><PARAM NAME="Editable" VALUE="0"><PARAM NAME="Measurable" VALUE="0"></OBJECT> 가 되고, 이 함수를 다시 x축의 방향으로 2만큼 평행이동하면 <OBJECT class=MATH classid=clsid:70E4BF88-2729-4A46-8794-D459BAC0EB63 width=110 align=absMiddle height=18><PARAM NAME="_cx" VALUE="2910"><PARAM NAME="_cy" VALUE="476"><PARAM NAME="BackColor" VALUE="4063280"><PARAM NAME="Enabled" VALUE="-1"><PARAM NAME="Script" VALUE="[0]#wh4/24.8`4.3/12,[1]{f(y, x-2)`equal`0}/{#xc333333}"><PARAM NAME="FontSize" VALUE="12"><PARAM NAME="FontColor" VALUE="3355443"><PARAM NAME="Editable" VALUE="0"><PARAM NAME="Measurable" VALUE="0"></OBJECT> 이 됩니다. </P> <P>ii)는 함수 <OBJECT class=MATH classid=clsid:70E4BF88-2729-4A46-8794-D459BAC0EB63 width=82 align=absMiddle height=18><PARAM NAME="_cx" VALUE="2169"><PARAM NAME="_cy" VALUE="476"><PARAM NAME="BackColor" VALUE="3932222"><PARAM NAME="Enabled" VALUE="-1"><PARAM NAME="Script" VALUE="[0]#wh4/18.7`4.3/12,[1]{f(x, y)`equal`0}/{#xc333333}"><PARAM NAME="FontSize" VALUE="12"><PARAM NAME="FontColor" VALUE="3355443"><PARAM NAME="Editable" VALUE="0"><PARAM NAME="Measurable" VALUE="0"></OBJECT> 을 y축의 방향으로 2만큼 평행이동하면</P> <P> <OBJECT class=MATH classid=clsid:70E4BF88-2729-4A46-8794-D459BAC0EB63 width=110 align=absMiddle height=18><PARAM NAME="_cx" VALUE="2910"><PARAM NAME="_cy" VALUE="476"><PARAM NAME="BackColor" VALUE="4063280"><PARAM NAME="Enabled" VALUE="-1"><PARAM NAME="Script" VALUE="[0]#wh4/24.8`4.3/12,[1]{f(x, y-2)`equal`0}/{#xc333333}"><PARAM NAME="FontSize" VALUE="12"><PARAM NAME="FontColor" VALUE="3355443"><PARAM NAME="Editable" VALUE="0"><PARAM NAME="Measurable" VALUE="0"></OBJECT> 이고, 이 함수를 다시 <OBJECT class=MATH classid=clsid:70E4BF88-2729-4A46-8794-D459BAC0EB63 width=42 align=absMiddle height=18><PARAM NAME="_cx" VALUE="1111"><PARAM NAME="_cy" VALUE="476"><PARAM NAME="BackColor" VALUE="3932222"><PARAM NAME="Enabled" VALUE="-1"><PARAM NAME="Script" VALUE="[0]#wh4/9.2`4.3/12,[1]{y`equal`x}/{#xc333333}"><PARAM NAME="FontSize" VALUE="12"><PARAM NAME="FontColor" VALUE="3355443"><PARAM NAME="Editable" VALUE="0"><PARAM NAME="Measurable" VALUE="0"></OBJECT> 에 대하여 대칭시킨면 역함수인 <OBJECT class=MATH classid=clsid:70E4BF88-2729-4A46-8794-D459BAC0EB63 width=110 align=absMiddle height=18><PARAM NAME="_cx" VALUE="2910"><PARAM NAME="_cy" VALUE="476"><PARAM NAME="BackColor" VALUE="4063280"><PARAM NAME="Enabled" VALUE="-1"><PARAM NAME="Script" VALUE="[0]#wh4/24.8`4.3/12,[1]{f(y, x-2)`equal`0}/{#xc333333}"><PARAM NAME="FontSize" VALUE="12"><PARAM NAME="FontColor" VALUE="3355443"><PARAM NAME="Editable" VALUE="0"><PARAM NAME="Measurable" VALUE="0"></OBJECT> 이 됩니다. </P></DIV>
