·ÖÎö £¨1£©ÏÈÈ·¶¨BµãºÍCµã×ø±ê£¬È»ºóÀûÓôý¶¨ÏµÊý·¨Çó³öÅ×ÎïÏß½âÎöʽ£¬ÔÙÀûÓÃÅä·½·¨È·¶¨¶¥µãDµÄ×ø±ê£¬´Ó¶øµÃµ½µãDµ½µØÃæOAµÄ¾àÀ룻
£¨2£©ÓÉÓÚÅ×ÎïÏߵĶԳÆÖáΪֱÏßx=6£¬¶øËíµÀÄÚÉèË«ÏòÐгµµÀ£¬³µ¿íΪ4m£¬Ôò»õÔËÆû³µ×îÍâ²àÓëµØÃæOAµÄ½»µãΪ£¨2£¬0£©»ò£¨10£¬0£©£¬È»ºó¼ÆËã×Ô±äÁ¿Îª2»ò10µÄº¯ÊýÖµ£¬ÔٰѺ¯ÊýÖµÓë6½øÐдóС±È½Ï¼´¿ÉÅжϣ»
£¨3£©Å×ÎïÏß¿ª¿ÚÏòÏ£¬º¯ÊýÖµÔ½´ó£¬¶Ô³ÆµãÖ®¼äµÄ¾àÀëԽС£¬ÓÚÊǼÆË㺯ÊýֵΪ8Ëù¶ÔÓ¦µÄ×Ô±äÁ¿µÄÖµ¼´¿ÉµÃµ½Á½ÅŵƵÄˮƽ¾àÀë×îСֵ£®
½â´ð ½â£º£¨1£©¸ù¾ÝÌâÒâµÃB£¨0£¬4£©£¬C£¨3£¬$\frac{17}{2}$£©£¬
°ÑB£¨0£¬4£©£¬C£¨3£¬$\frac{17}{2}$£©´úÈëy=-$\frac{1}{6}$x2+bx+cµÃ$\left\{\begin{array}{l}{c=4}\\{-\frac{1}{6}¡Á{3}^{2}+3b+c=\frac{17}{2}}\end{array}\right.$£¬
½âµÃ$\left\{\begin{array}{l}{b=2}\\{c=4}\end{array}\right.$£®
ËùÒÔÅ×ÎïÏß½âÎöʽΪy=-$\frac{1}{6}$x2+2x+4£¬
Ôòy=-$\frac{1}{6}$£¨x-6£©2+10£¬
ËùÒÔD£¨6£¬10£©£¬
ËùÒÔ¹°¶¥Dµ½µØÃæOAµÄ¾àÀëΪ10m£»
£¨2£©ÓÉÌâÒâµÃ»õÔËÆû³µ×îÍâ²àÓëµØÃæOAµÄ½»µãΪ£¨2£¬0£©»ò£¨10£¬0£©£¬
µ±x=2»òx=10ʱ£¬y=$\frac{22}{3}$£¾6£¬
ËùÒÔÕâÁ¾»õ³µÄܰ²È«Í¨¹ý£»
£¨3£©Áîy=8£¬Ôò-$\frac{1}{6}$£¨x-6£©2+10=8£¬½âµÃx1=6+2$\sqrt{3}$£¬x2=6-2$\sqrt{3}$£¬
Ôòx1-x2=4$\sqrt{3}$£¬
ËùÒÔÁ½ÅŵƵÄˮƽ¾àÀë×îСÊÇ4$\sqrt{3}$m£®
µãÆÀ ±¾Ì⿼²éÁ˶þ´Îº¯ÊýµÄÓ¦Ó㺹¹½¨¶þ´Îº¯ÊýÄ£Ðͽâ¾öʵ¼ÊÎÊÌ⣬ÀûÓöþ´Îº¯Êý½â¾öÅ×ÎïÏßÐεÄËíµÀ¡¢´óÇź͹°ÃŵÈʵ¼ÊÎÊÌâʱ£¬ÒªÇ¡µ±µØ°ÑÕâЩʵ¼ÊÎÊÌâÖеÄÊý¾ÝÂäʵµ½Æ½ÃæÖ±½Ç×ø±êϵÖеÄÅ×ÎïÏßÉÏ£¬´Ó¶øÈ·¶¨Å×ÎïÏߵĽâÎöʽ£¬Í¨¹ý½âÎöʽ¿É½â¾öһЩ²âÁ¿ÎÊÌâ»òÆäËûÎÊÌ⣮
| Äê¼¶ | ¸ßÖÐ¿Î³Ì | Äê¼¶ | ³õÖÐ¿Î³Ì |
| ¸ßÒ» | ¸ßÒ»Ãâ·Ñ¿Î³ÌÍÆ¼ö£¡ | ³õÒ» | ³õÒ»Ãâ·Ñ¿Î³ÌÍÆ¼ö£¡ |
| ¸ß¶þ | ¸ß¶þÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ | ³õ¶þ | ³õ¶þÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ |
| ¸ßÈý | ¸ßÈýÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ | ³õÈý | ³õÈýÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ |
¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | Õý·½ÐÎ | B£® | ÁâÐÎ | C£® | ¾ØÐÎ | D£® | µÈÑüÌÝÐÎ |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£º½â´ðÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£ºÌî¿ÕÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | x1£¼x2£¼x3 | B£® | x1£¼x3£¼x2 | C£® | x2£¼x1£¼x3 | D£® | x2£¼x3£¼x1 |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | a=3£¬b=1 | B£® | a=-3£¬b=1 | C£® | a=3£¬b=-1 | D£® | a=-3£¬b=-1 |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | 2£¨x2-8£© | B£® | 2£¨x-2£©2 | C£® | 2£¨x+2£©£¨x-2£© | D£® | 2x£¨x-$\frac{4}{x}$£© |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | a+b | B£® | a-b | C£® | b-a | D£® | -a-b |
²é¿´´ð°¸ºÍ½âÎö>>
¹ú¼ÊѧУÓÅÑ¡ - Á·Ï°²áÁбí - ÊÔÌâÁбí
ºþ±±Ê¡»¥ÁªÍøÎ¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨Æ½Ì¨ | ÍøÉÏÓк¦ÐÅÏ¢¾Ù±¨×¨Çø | µçÐÅթƾٱ¨×¨Çø | ÉæÀúÊ·ÐéÎÞÖ÷ÒåÓк¦ÐÅÏ¢¾Ù±¨×¨Çø | ÉæÆóÇÖȨ¾Ù±¨×¨Çø
Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com