[代數] equavalence relation

看板Math作者TampaBayRays (坦帕灣光芒)時間14年前 (2011/11/02 21:00)推噓2(2推 0噓 9→)

留言11則, 5人參與討論串1/1

1. nRm in Z if nm > 0 X 2. xR in R if |x| = |y| O 可以告訴我為什麼上面是下面不是嗎??? 謝謝順便借問一下微方 y''-2y'-3y=2-3t*e^(-t) 要怎麼解呢? 我試過設Y=2-3t*e^(-t),Y=e^(-t),Y=t*e^(-t) 好像都不太行還是我算錯了謝謝 -- 1 2 3 4 5 6 7 8 9 10 11 12 R H E Wednesday, September 28, 2011 NYY 1 4 0 1 1 0 0 0 0 0 0 0 7 9 1 No.162 at Tropicana Field TB 0 0 0 0 0 0 0 6 1 0 0 1 8 10 1 Rays get the AL wild card TB 6:7 NYY 8▼ Evan Longoria 3-run homers (30) to left field. TB 7:7 NYY 9▼ Dan Johnson solo homers (2) to right field. TB 8:7 NYY 12▼ Evan Longoria walk-off solo homers (31) to left field. -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 220.136.44.242

→

vanillaXleft

11/02 22:48, , 1^F

11/02 22:48, 1^F

→

TampaBayRays

11/02 23:00, , 2^F

11/02 23:00, 2^F

→

TampaBayRays

11/02 23:00, , 3^F

11/02 23:00, 3^F