<P>이현녀 선생님의 답글입니다.</P> <P> </P> <DIV class=board> <P>주어진 문제에서 </P> <P> <OBJECT class=MATH classid=clsid:70E4BF88-2729-4A46-8794-D459BAC0EB63 width=203 align=absMiddle height=24><PARAM NAME="_cx" VALUE="5371"><PARAM NAME="_cy" VALUE="635"><PARAM NAME="BackColor" VALUE="3932222"><PARAM NAME="Enabled" VALUE="-1"><PARAM NAME="Script" VALUE="[0]#wh4/45.9`5.6/12,[1]{{a}_{1}`plus`{2a}_{2}`plus`{3a}_{3}`plus`hdot3`plus`{na}_{n}`plus`hdot3}/{#xc333333}"><PARAM NAME="FontSize" VALUE="12"><PARAM NAME="FontColor" VALUE="3355443"><PARAM NAME="Editable" VALUE="0"><PARAM NAME="Measurable" VALUE="0"></OBJECT> 의 일반항은 <OBJECT class=MATH classid=clsid:70E4BF88-2729-4A46-8794-D459BAC0EB63 width=27 align=absMiddle height=24><PARAM NAME="_cx" VALUE="714"><PARAM NAME="_cy" VALUE="635"><PARAM NAME="BackColor" VALUE="3932222"><PARAM NAME="Enabled" VALUE="-1"><PARAM NAME="Script" VALUE="[0]#wh4/6.3`5.6/12,[1]{{na}_{n}}/{#xc333333}"><PARAM NAME="FontSize" VALUE="12"><PARAM NAME="FontColor" VALUE="3355443"><PARAM NAME="Editable" VALUE="0"><PARAM NAME="Measurable" VALUE="0"></OBJECT> 이고, </P> <P>(1)에서 구하라는 것은 <OBJECT class=MATH classid=clsid:70E4BF88-2729-4A46-8794-D459BAC0EB63 width=18 align=absMiddle height=24><PARAM NAME="_cx" VALUE="476"><PARAM NAME="_cy" VALUE="635"><PARAM NAME="BackColor" VALUE="3932222"><PARAM NAME="Enabled" VALUE="-1"><PARAM NAME="Script" VALUE="[0]#wh4/4.3`5.6/12,[1]{{a}_{n}}/{#xc333333}"><PARAM NAME="FontSize" VALUE="12"><PARAM NAME="FontColor" VALUE="3355443"><PARAM NAME="Editable" VALUE="0"><PARAM NAME="Measurable" VALUE="0"></OBJECT> 임을 간과한 것 같습니다.</P> <P>따라서 님께서 구하신 일반항은</P> <P> <OBJECT class=MATH classid=clsid:70E4BF88-2729-4A46-8794-D459BAC0EB63 width=107 align=absMiddle height=30><PARAM NAME="_cx" VALUE="2831"><PARAM NAME="_cy" VALUE="793"><PARAM NAME="BackColor" VALUE="4063280"><PARAM NAME="Enabled" VALUE="-1"><PARAM NAME="Script" VALUE="[0]#wh4/24.3`7/12,[1]{{na}_{n}`equal`3{n}^{2}`plus`3n}/{#xc333333}"><PARAM NAME="FontSize" VALUE="12"><PARAM NAME="FontColor" VALUE="3355443"><PARAM NAME="Editable" VALUE="0"><PARAM NAME="Measurable" VALUE="0"></OBJECT></P> <P>이므로 </P> <P> <OBJECT class=MATH classid=clsid:70E4BF88-2729-4A46-8794-D459BAC0EB63 width=165 align=absMiddle height=30><PARAM NAME="_cx" VALUE="4365"><PARAM NAME="_cy" VALUE="793"><PARAM NAME="BackColor" VALUE="4063280"><PARAM NAME="Enabled" VALUE="-1"><PARAM NAME="Script" VALUE="[0]#wh4/37.4`7/12,[1]{{a}_{n}`equal`3{n}^{}`plus`3`equal`3(n`plus`1)}/{#xc333333}"><PARAM NAME="FontSize" VALUE="12"><PARAM NAME="FontColor" VALUE="3355443"><PARAM NAME="Editable" VALUE="0"><PARAM NAME="Measurable" VALUE="0"></OBJECT> 이 맞습니다.</P></DIV>
