·ÖÎö £¨1£©µ±kΪÆæÊýʱ£¬k+1ÊÇżÊý£¬Ôòk£¨k+1£©ÊÇÄܱ»3Õû³ýµÄżÊý£¬¹Êk£¨k+1£©ÊÇ6µÄ±¶Êý£»µ±kΪżÊýʱ£¬Ôòk£¨k+1£©ÊÇÄܱ»3Õû³ýµÄżÊý£¬¹Êk£¨k+1£©ÊÇ6µÄ±¶Êý£¬
£¨2£©¸ù¾ÝÌâÒâµÃp=t£¨t+1£©£¬q=s£¨s+1£©£¬D£¨p£¬q£©=t£¨t+1£©-s£¨s+1£©=30£¬¼´t2+t-s2-s=30£¬·Ö½âÒòʽµÃµ½£¨t-s£©£¨t+s+1£©=30£¬¸ù¾Ý30=1¡Á30=2¡Á15=3¡Á10=5¡Á6£¬µÃµ½·½³Ì×éÇóµÃ$\left\{\begin{array}{l}{t=15}\\{s=14}\end{array}\right.$»ò$\left\{\begin{array}{l}{t=8}\\{s=6}\end{array}\right.$»ò$\left\{\begin{array}{l}{t=6}\\{s=3}\end{array}\right.$»ò$\left\{\begin{array}{l}{t=5}\\{s=0}\end{array}\right.$£¬ÓÚÊǵõ½½áÂÛ£®
½â´ð ½â£º£¨1£©Èô¡°¾ØÊý¡±m=k£¨k+1£©ÊÇ3µÄ±¶Êý£¬Ôòk£¨k+1£©ÊÇ3µÄ±¶Êý£¬kÊÇÕýÕûÊý£¬
µ±kΪÆæÊýʱ£¬k+1ÊÇżÊý£¬Ôòk£¨k+1£©ÊÇÄܱ»3Õû³ýµÄżÊý£¬¹Êk£¨k+1£©ÊÇ6µÄ±¶Êý£»
µ±kΪżÊýʱ£¬Ôòk£¨k+1£©ÊÇÄܱ»3Õû³ýµÄżÊý£¬¹Êk£¨k+1£©ÊÇ6µÄ±¶Êý£¬
×ÛÉÏËùÊö£¬Èô¡°¾ØÊý¡±mÊÇ3µÄ±¶Êý£¬ÔòmÒ»¶¨ÊÇ6µÄ±¶Êý£»
£¨2£©¸ù¾ÝÌâÒâµÃp=t£¨t+1£©£¬q=s£¨s+1£©£¬D£¨p£¬q£©=t£¨t+1£©-s£¨s+1£©=30£¬
¼´t2+t-s2-s=30£¬
¡à£¨t-s£©£¨t+s+1£©=30£¬
¡ßt£¬sÊÇÕýÕûÊý£¬t£¾s£¬
¡àt-s£¬t+s+1ÊÇÕýÕûÊý£¬ÇÒt+s+1£¾t-s£¬
¡ß30=1¡Á30=2¡Á15=3¡Á10=5¡Á6£¬
¡à$\left\{\begin{array}{l}{t-s=1}\\{t+s+1=30}\end{array}\right.$»ò$\left\{\begin{array}{l}{t-s=2}\\{t+s+2=15}\end{array}\right.$»ò$\left\{\begin{array}{l}{t-s=3}\\{t+s+1=10}\end{array}\right.$»ò$\left\{\begin{array}{l}{t-s=5}\\{t+s+1=6}\end{array}\right.$£¬
½âµÃ£º$\left\{\begin{array}{l}{t=15}\\{s=14}\end{array}\right.$»ò$\left\{\begin{array}{l}{t=8}\\{s=6}\end{array}\right.$»ò$\left\{\begin{array}{l}{t=6}\\{s=3}\end{array}\right.$»ò$\left\{\begin{array}{l}{t=5}\\{s=0}\end{array}\right.$£¬
¡ßt£¬sÊÇÕýÕûÊý£¬
¡à·ûºÏÌõ¼þµÄÊÇ£º$\left\{\begin{array}{l}{t=15}\\{s=14}\end{array}\right.$»ò$\left\{\begin{array}{l}{t=8}\\{s=6}\end{array}\right.$»ò$\left\{\begin{array}{l}{t=6}\\{s=3}\end{array}\right.$£¬
¡à$\frac{s}{t}=\frac{14}{15}$»ò$\frac{s}{t}$=$\frac{3}{4}$»ò$\frac{s}{t}$=$\frac{1}{2}$£¬
¡ß$\frac{14}{15}£¾\frac{3}{4}£¾\frac{1}{2}$£¬
¡à$\frac{s}{t}$µÄ×î´óÖµÊÇ$\frac{14}{15}$£®
µãÆÀ ±¾Ì⿼²éÁËÒòʽ·Ö½âµÄÓ¦Ó㬽â¶þÔªÒ»´Î·½³Ì×飬ÕýÈ·µÄÀí½âÌâÒâÊǽâÌâµÄ¹Ø¼ü£®
Ä꼶 | ¸ßÖÐ¿Î³Ì | Ä꼶 | ³õÖÐ¿Î³Ì |
¸ßÒ» | ¸ßÒ»Ãâ·Ñ¿Î³ÌÍƼö£¡ | ³õÒ» | ³õÒ»Ãâ·Ñ¿Î³ÌÍƼö£¡ |
¸ß¶þ | ¸ß¶þÃâ·Ñ¿Î³ÌÍƼö£¡ | ³õ¶þ | ³õ¶þÃâ·Ñ¿Î³ÌÍƼö£¡ |
¸ßÈý | ¸ßÈýÃâ·Ñ¿Î³ÌÍƼö£¡ | ³õÈý | ³õÈýÃâ·Ñ¿Î³ÌÍƼö£¡ |
¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£ºÌî¿ÕÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | S1£¼S3£¼S2 | B£® | S1£¼S2£¼S3 | C£® | S2£¼S1£¼S3 | D£® | S3£¼S1£¼S2 |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£º½â´ðÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£º½â´ðÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | -4 | B£® | |4| | C£® | $\sqrt{4}$ | D£® | $\frac{1}{4}$ |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | ƽ¾ùÊýÊÇ14 | B£® | ÖÚÊýÊÇ10 | C£® | ÖÐλÊýÊÇ15 | D£® | ·½²îÊÇ22 |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | 80+0.5x=30 | B£® | 0.5x-80=30 | C£® | $\frac{80}{x}$-0.5=$\frac{30}{x}$ | D£® | $\frac{x}{80}$+0.5=$\frac{x}{30}$ |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£º½â´ðÌâ
²É¹ºÊýÁ¿£¨¼þ£© | 2 | 4 | 6 | ¡ |
A²úÆ·µ¥¼Û£¨Ôª£© | 1460 | 1420 | 1380 | ¡ |
B²úÆ·µ¥¼Û£¨Ôª£© | 1280 | 1260 | 1240 | ¡ |
²é¿´´ð°¸ºÍ½âÎö>>
°Ù¶ÈÖÂÐÅ - 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