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    ±³Àç Q&A HOME > ±³Àç > ±³ÀçQ&A

    ÇØÄ¿½º°ø¹«¿ø ¼öÇÐ 2±Ç | ±³Àç Q&A
    ¼Õ*·æ |Á¶È¸ 1658 |2017.05.17 11:32 ÁÖ¼Òº¹»ç [¸µÅ©Çϱâ]

    (1) ±³Àç¸í : ÇØÄ¿½º°ø¹«¿ø ¼öÇÐ 2±Ç

    (2) °ü·Ã ÆäÀÌÁö Âʼö : 5ȸ °í³­µµ ¸ðÀÇ°í»ç-2¹ø

    (3) ¹®ÀÇ»çÇ× :


    5ȸ °í³­µµ ¸ðÀÇ°í»ç-2¹ø Çؼ³À» º¸¸é

    xn(x-3){x-(a-3)}=(x-3){(x-3)Q(x)+3n}¿¡¼­

    (x-3)À» ³ª´²¼­ xn{x-(a-3)}=(x-3)Q(x)+3nÀÌ µÇ°í

    À§ ½Ä¿¡¼­ ´Ù½Ã x=3À» ´ëÀÔÇÏ¿© a¸¦ ±¸Çϴµ¥,

    (x-3)À» ³ª´©´Â °ÍÀº x=3ÀÌ ¾Æ´Ò¶§ ³ª´©´Â °ÍÀ̹ǷÎ,

    ³ª´«½Ä¿¡¼­ x=3À» ´ëÀÔÇÏ¸é ¾ÈµÇ´Â°Å ¾Æ´Õ´Ï±î?


    Çؼ³¼­¿¡´Â Ç×µî½ÄÀ̶ó°íÇÏ¿© ´ëÀÔÇÏ¿© Ǫ´Âµ¥,

    xn(x-3){x-(a-3)}=(x-3){(x-3)Q(x)+3n}ÀÌ Ç×µî½ÄÀ̶óµµ,

    x=3À϶§´Â Á¿캯 0À̵Å, xn{x-(a-3)}=(x-3)Q(x)+3nÀÌ ¾Æ´Ï¶óµµ ¼º¸³ÇÏÀݾƿä.

    µû¶ó¼­, (x-3)À» ³ª´« xn{x-(a-3)}=(x-3)Q(x)+3nÀÌ

    x=3À϶§´Â ¼º¸³ÇÏÁö ¾ÊÀ» ¼öµµ ÀÖ´Â °Í ¾Æ´Ñ°¡¿ä?

    µû¶ó¼­, xn{x-(a-3)}=(x-3)Q(x)+3n¿¡ x=3 ´ëÀÔÇÏ¸é ¾ÈµÇ´Â °Í ¾Æ´Ñ°¡¿ä?







    ¾È³çÇϼ¼¿ä, ¼Õ¼º·æ ´Ô. Çհݵ¿Çà ÇØÄ¿½ºÀÔ´Ï´Ù.

    ¼Õ¼º·æ ´ÔÀÇ ¹®ÀÇ»çÇ×À» È®ÀÎÇÏ¿´À¸¸ç, ºü¸¥ ½ÃÀÏ ³»¿¡ ´äº¯µå¸± ¼ö ÀÖµµ·Ï ÇÏ°Ú½À´Ï´Ù.

    ÇÕ°ÝÇÏ´Â ±×³¯±îÁö ÃÖ°íÀÇ °­ÀÇ¿Í ¼­ºñ½º¸¦ Á¦°øÇÒ ¼ö ÀÖµµ·Ï Ç×»ó ³ë·ÂÇÏ°Ú½À´Ï´Ù.

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    2017/05/17
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    ¾È³çÇϼ¼¿ä, ¼Õ¼º·æ ´Ô. Çհݵ¿Çà ÇØÄ¿½ºÀÔ´Ï´Ù.

    ÇØÄ¿½º °ø¹«¿ø ¼öÇÐ 2±Ç °ü·Ã ¼Õ¼º·æ ´ÔÀÇ ¹®ÀÇ»çÇ×À» È®ÀÎÇÏ¿´½À´Ï´Ù.

    x^n(x-3){x-(a-3)}=(x-3){(x-3)Q(x)+3n}¿¡¼­ (x-3)À» ³ª´« °ÍÀÌ ¾Æ´Õ´Ï´Ù.
    x^n(x-3){x-(a-3)}=(x-3){(x-3)Q(x)+3n}ÀÌ Ç×µî½ÄÀ̹ǷÎ
    ¾çº¯¿¡ °øÅëÀûÀ¸·Î µé¾î°¡ ÀÖ´Â ÀμöÀÎ (x-3)À» Á¦¿ÜÇÑ ³ª¸ÓÁö ºÎºÐ x^n{x-(a-3)}=(x-3)Q(x)+3nµµ Ç×µî½ÄÀÌ µÊÀ» ÀǹÌÇÕ´Ï´Ù.

    µû¶ó¼­ ¾çº¯¿¡ x=3À» ´ëÀÔÇÏ¿© ¹®Á¦¸¦ ÇØ°áÇÒ ¼ö ÀÖ½À´Ï´Ù.

    x¿¡ °üÇÑ ½Ä A(x), B(x)¿¡ ´ëÇØ A(x)B(x)=A(x)□¿¡¼­ □ÀÌ ½Ä B(x)¿Í ÀÏÄ¡ÇÏÁö ¾ÊÀ¸¸é A(x)B(x)=A(x)□Àº Ç×µî½ÄÀÌ µÉ ¼ö ¾ø½À´Ï´Ù. µû¶ó¼­ A(x)B(x)=A(x)□ÀÌ Ç×µî½ÄÀÌ¸é ¾çº¯À» A(x)·Î ³ª´©Áö ¾Ê´õ¶óµµ □´Â ½Ä B(x)¿Í °°Àº ½Ä Áï, Ç×µî½ÄÀ̾î¾ß ÇÕ´Ï´Ù.

    ÇнÀ¿¡ ¸¹Àº µµ¿òÀÌ µÇ¾ú±â¸¦ ¹Ù¶ø´Ï´Ù.

    ¾ÕÀ¸·Îµµ °øºÎ¸¦ ÇϽôٰ¡ ±Ã±ÝÇϰųª ÀÌÇØ°¡ Àß µÇÁö ¾Ê´Â ºÎºÐÀÌ ÀÖÀ» ½Ã ¾ðÁ¦µçÁö Áú¹®À» ³²°ÜÁֽñ⠹ٶø´Ï´Ù.
    ½ÃÇè¿¡ ÇÕ°ÝÇϽô ±×³¯±îÁö ÀúÈñ ÇØÄ¿½º °ø¹«¿øÇпø°ú °ø¹«¿ø½ÃÇ迬±¸¼Ò¿¡¼­ Ç×»ó ÈûÀÌ µÇ¾îµå¸®°Ú½À´Ï´Ù.

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