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| **«æ**¦Ò¨÷q¥¿ÃD¥Ø>"<(°ª¤¤ÃD¥Ø) | | 1.³]mÄÝ©óR¡A¤èµ{¦¡3^2X -2(M+1)¡D3^X - (M-1)=0¦³¨â¬Û¤@¹ê®Ú¡A±om¤§½d³ò¬°£ |
| 2006-04-02 19:13 | | frog Just can't stay away
µù¥U¤é: 2006-02-28 µoªí¼Æ: 114
| Re: **«æ**¦Ò¨÷q¥¿ÃD¥Ø>"<(°ª¤¤ÃD¥Ø) | | ¥Oy=3^X,«hy^2=3^(2X) «h즡¥i§ï¼g¦¨ y^2-2(M+1)y- (M-1)=0 ¦]¬°¦³¬Û²§¹ê®Ú,«h 4(M+1)^2+4(M-1)>0 «hM^2+3M>0 M(M+3)>0 ©Ò¥Hy¦³¬Û²§¹ê®ÚM>0©ÎM¤p©ó-3 ¦]y=3^X,©Ò¥Hy¦³¬Û²§¹ê®Ú,¬Û·í©óX¦³¬Û²§¹ê®Ú ©Ò¥HX¦³¬Û²§¹ê®Úªº±ø¥ó¤]¬OM>0©ÎM¤p©ó-3
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| 2006-04-03 00:34 | | ³X«È
| Re: **«æ**¦Ò¨÷q¥¿ÃD¥Ø>"<(°ª¤¤ÃD¥Ø) | | ¿ù |
| 2006-04-03 22:13 | | frog Just can't stay away
µù¥U¤é: 2006-02-28 µoªí¼Æ: 114
| Re: **«æ**¦Ò¨÷q¥¿ÃD¥Ø>"<(°ª¤¤ÃD¥Ø) | | Why? ·Ð½Ð½ç±Ð! Thanks. |
| 2006-04-03 22:26 | | frog Just can't stay away
µù¥U¤é: 2006-02-28 µoªí¼Æ: 114
| Re: **«æ**¦Ò¨÷q¥¿ÃD¥Ø>"<(°ª¤¤ÃD¥Ø) | | ¤Þ¤å:
frog ¼g¹D: ¥Oy=3^X,«hy^2=3^(2X) «h즡¥i§ï¼g¦¨ y^2-2(M+1)y- (M-1)=0 ¦]¬°¦³¬Û²§¹ê®Ú,«h 4(M+1)^2+4(M-1)>0 «hM^2+3M>0 M(M+3)>0 ©Ò¥Hy¦³¬Û²§¹ê®ÚM>0©ÎM¤p©ó-3 ¦]y=3^X,©Ò¥Hy¦³¬Û²§¹ê®Ú,¬Û·í©óX¦³¬Û²§¹ê®Ú ©Ò¥HX¦³¬Û²§¹ê®Úªº±ø¥ó¤]¬OM>0©ÎM¤p©ó-3
Sorry,¦³¤@±ø¥ó¥¼¦Ò¼{¨ì,§ó¥¿¦p¤U: ©Ó¤W±¤Þ¤å: y^2-2(M+1)y- (M-1)=0,y=3^X y=m+1+(m^2+3m)^(1/2),m+1-(m^2+3m)^(1/2) ¦]¬°y¦³¬Û²§¹ê®Ú¥By=3^X>0,©Ò¥H¤U¦C¤T±ø¥óÀ³¦P®Éº¡¨¬: (1)m^2+3m>0,«hM>0©ÎM¤p©ó-3 (2))m+1>0,«hm>-1 (3)m+1-(m^2+3m)^(1/2)>0,«hm¤p©ó1 ¥þ³¡¨ú¥æ¶°,±o0 |
| 2006-04-04 07:25 | | frog Just can't stay away
µù¥U¤é: 2006-02-28 µoªí¼Æ: 114
| Re: **«æ**¦Ò¨÷q¥¿ÃD¥Ø>"<(°ª¤¤ÃD¥Ø) | | ¤Þ¤å:
frog ¼g¹D:
¤Þ¤å:
frog ¼g¹D: ¥Oy=3^X,«hy^2=3^(2X) «h즡¥i§ï¼g¦¨ y^2-2(M+1)y- (M-1)=0 ¦]¬°¦³¬Û²§¹ê®Ú,«h 4(M+1)^2+4(M-1)>0 «hM^2+3M>0 M(M+3)>0 ©Ò¥Hy¦³¬Û²§¹ê®ÚM>0©ÎM¤p©ó-3 ¦]y=3^X,©Ò¥Hy¦³¬Û²§¹ê®Ú,¬Û·í©óX¦³¬Û²§¹ê®Ú ©Ò¥HX¦³¬Û²§¹ê®Úªº±ø¥ó¤]¬OM>0©ÎM¤p©ó-3
Sorry,¦³¤@±ø¥ó¥¼¦Ò¼{¨ì,§ó¥¿¦p¤U: ©Ó¤W±¤Þ¤å: y^2-2(M+1)y- (M-1)=0,y=3^X y=m+1+(m^2+3m)^(1/2),m+1-(m^2+3m)^(1/2) ¦]¬°y¦³¬Û²§¹ê®Ú¥By=3^X>0,©Ò¥H¤U¦C¤T±ø¥óÀ³¦P®Éº¡¨¬: (1)m^2+3m>0,«hM>0©ÎM¤p©ó-3 (2))m+1>0,«hm>-1 (3)m+1-(m^2+3m)^(1/2)>0,«hm¤p©ó1 ¥þ³¡¨ú¥æ¶°,±om¤j©ó0¥Bm¤p©ó1,§Ym¤¶©ó0»P1¤§¶¡ ¦]y=3^X¬°¤@¹ï¤@¨ç¼Æ,©Ò¥Hx¦³¬Û²§¹ê®Úªº±ø¥ó»Py¦³¬Û²§¹ê®Úªº±ø¥ó¬Û¦P
¤S¤£¤p¤ß¥Î¨ì¤p©óªº²Å¸¹¤F,§ó¥¿¦p¤W±¤Þ¤å |
| 2006-04-04 07:29 | |
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