ÌâÄ¿ÄÚÈÝ
ÈçͼËùʾ£¬ÒÔ×ø±êÔµãOΪԲÐĵİ뾶ΪRµÄ°ëÔ²ÐÎÇøÓòÀÓÐÒ»´¹Ö±Ö½ÃæÏòÀïµÄÔÈÇ¿´Å³¡(°üÀ¨±ß½ç)£¬´Å¸ÐӦǿ¶ÈΪB¡£Í¼ÖÐabcdÊÇÒ»¸öÍâÇÐÓÚ°ëÔ²µÄ¾ØÐα߽çÏß¡£ÔÚ- R £ y £ RµÄÇø¼äÄÚ£¬ÓÐÒ»ÊøËÙ¶ÈÏàͬµÄ´øµçÁ£×Ó´¹Ö±yÖáÉäÈë´Å³¡ÇøÓò£¬Á£×ÓµÄÖÊÁ¿Îªm¡¢µçºÉÁ¿Îªq£¬Á£×ÓµÄÖØÁ¦ºöÂÔ²»¼Æ¡£½á¹û¼ì²âµ½¾ØÐα߽çÏßµÄab¡¢be¶Î¾ùÓÐÁ£×ÓÉä³ö£¬¶ø¾ØÐα߽çÏßÆäÓಿ·Ö¾ùÎÞÁ£×ÓÉä³ö¡£Çó£º
£¨1£©Á£×ÓÈëÉäµÄËÙ¶ÈÊǶà´ó?
£¨2£©´ÓOµãÈëÉäµÄÁ£×Ó£¬´Ó¾ØÐα߽çÏßÉϵÄʲôλÖÃÉä³ö¡£
£¨3£©´Ó(0£¬R/2)µãÈëÉäµÄÁ£×Ó£¬´Ó¾ØÐα߽çÏßÉϵÄʲôλÖÃÉä³ö¡£
½â£º£¨1£©ÒòΪÔÚab¡¢be¶Î¾ùÓÐÁ£×ÓÉä³ö£¬ÆäÓಿ·Ö¾ùÎÞÁ£×ÓÉä³ö£¬ËùÒÔÁ£×Ó´øÕýµç£¬ÇÒÁ£×ÓÔڴų¡ÖеĹ켣°ë¾¶Âú×ã
r = R¡¡¡¡¡¡¡¡¡¡¡ £¨3·Ö£©
ÓÖ¸ù¾Ý ¡¡¡¡¡¡¡¡ ..£¨2·Ö£©
µÃÈëÉäÁ£×ÓµÄËÙ¶È ¡¡¡¡¡¡ £¨2·Ö£©
£¨2£©´ÓOµãÈëÉäµÄÁ£×Ó£¬´ÓEµãÉä³ö´Å³¡£¬¾¹ý±ß½çÏßbeÉϵÄDµã£¬ÈçͼËùʾ¡£ÒòΪOE¹ÂµÄ°ë¾¶r = R £¬ ËùÒÔOE¹ÂµÄÔ²Ðļ´Îªaµã£¬DaOEΪµÈ±ßÈý½ÇÐΣ¬
q = 60¡ã £¬ÔòDµãµÄ×ø±êÖµ
xD = R¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡£¨2·Ö£©
¡¡£¨5·Ö£©
£¨3£©´Óy = R/2µÄgµãÉäÈ룬ÔÚhµãÉä³ö´Å³¡£¬ ÔÚkµãÉä³ö¾ØÐα߽çÏߣ¬ÈçͼËùʾ
¡¡¡¡¡¡¡¡..£¨2·Ö£©
£¨1·Ö£©
¡¡¡..£¨1·Ö£©
Dm f h ÏàËÆÓÚ D klh
¼´£º
£¬¡¡¡¡¡¡¡¡¡¡¡..£¨2·Ö£©
ÔòkµãµÄλÖÃ×ø±ê£º
¡..£¨2·Ö£©
¡¡¡¡¡¡¡¡¡¡¡¡.¡..£¨1·Ö£©
A¡¢´ÓaÒƵ½b£¬µç³¡Á¦²»×ö¹¦ | B¡¢´ÓaÒƵ½c£¬µç³¡Á¦²»×ö¹¦ | C¡¢´ÓdÒƵ½b£¬µç³¡Á¦×ö¹¦Îª2qEr | D¡¢´ÓdÒƵ½a£¬µç³¡Á¦×ö¹¦Îª2qEr |