%%18. ¼¼ Á¡ x0<x1<x2¿¡ ´ëÇÏ¿© q(x0)=y0, q'(x1)=y1', q(x2)=y2 À» ¸¸Á·½ÃÅ°´Â Â÷¼ö deg(q)<=2ÀÇ ´ÙÇ×½Ä q(x)¸¦ ãÀ¸½Ã¿À. ÁÖ¾îÁø º¸°£Á¶°ÇÀ¸·ÎºÎÅÍ q(x)¸¦ À¯ÀÏÇÏ°Ô Á¤Çϱâ À§ÇÏ¿© ¸¸ÀÏ ¹«½¼ Á¶°ÇÀÌ ÀÖ´Ù¸é ÇÊ¿äÇÑ°¡?
q(x) = y0*M0(x) + y1'*M1(x) + y2*M2(x) ¶ó ÇÏÀÚ.
q(x0) = y0 À̹ǷΠM0(x0)=1, M1(x0)=M2(x0)=0 q(x2) = y2 À̹ǷΠM2(x2)=1, M0(x2)=M1(x2)=0 q'(x1) = y1' À̹ǷΠM1'(x1)=1, M0'(x1)=M2'(x1)=0
±×·¯¹Ç·Î q(x) = y0*1 + y1'*(x+c) + y2*1 = y1'*x + y0 + y2 + y1'*c
À§ ´ÙÇ×½ÄÀÌ À¯ÀÏÇϱâ À§Çؼ´Â »ó¼ö c°¡ À¯ÀÏÇØ¾ß ÇÑ´Ù.
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