→ johnny790701:2 118.166.66.135 09/10 15:30
推 harebuta:2 218.210.35.198 09/10 15:30
推 as259678:2 125.228.109.83 09/10 15:30
→ johnny790701:2^0.5 118.166.66.135 09/10 15:30
→ johnny790701:8^0.5 118.166.66.135 09/10 15:31
→ as259678:改 正負2 125.228.109.83 09/10 15:31
推 t52101t:+2吧@@?120.105.158.119 09/10 15:32
推 pIghoMe:b^2-4ac=0175.181.142.166 09/10 15:32
→ jason1218:強尼請問答案是??122.126.233.216 09/10 15:32
→ as259678:正負皆可吧 125.228.109.83 09/10 15:32
推 johnny790701:8^0.5 118.166.66.135 09/10 15:33
推 killuaz:K=正負2 114.42.105.163 09/10 15:33
→ as259678:一個圖型向上 一個向下 125.228.109.83 09/10 15:33
→ johnny790701:如果是正負二就給吼樂 這題真的不熟 118.166.66.135 09/10 15:33
→ as259678: ^開口 125.228.109.83 09/10 15:33
→ jason1218:harebuta得分!! b^2-4ac=0~~~122.126.233.216 09/10 15:34
→ johnny790701:這題我要解說了 118.166.66.135 09/10 15:34
推 t52101t:k=b^2-4ac=0 = =???120.105.158.119 09/10 15:34
→ jason1218:請說~~122.126.233.216 09/10 15:34
推 pIghoMe:公式解那邊175.181.142.166 09/10 15:34
→ pIghoMe:k=a175.181.142.166 09/10 15:35
※ 編輯: jason1218 來自: 122.126.233.216 (09/10 15:35)
推 johnny790701:我是說我要你們解說啦 XD 118.166.66.135 09/10 15:35
→ t52101t:所以題目是問公式@@??120.105.158.119 09/10 15:36
→ johnny790701:因為我沒背公式啊 我只會配方啊 118.166.66.135 09/10 15:36
→ johnny790701:可是我配方配錯啊 118.166.66.135 09/10 15:36
→ johnny790701:我知道怎麼做了 118.166.66.135 09/10 15:36
→ pIghoMe:相交於一點表示重根 就推得b^2-4ac=0175.181.142.166 09/10 15:36
→ harebuta:沒記錯開口向下的話是整個式子加負號... 218.210.35.198 09/10 15:36
→ pIghoMe:開口要整個式子乘-1175.181.142.166 09/10 15:37
→ jason1218:與x切於一點=>原式=0時，該方程式重根122.126.233.216 09/10 15:37
推 t52101t:算了 我們沒交集QQ120.105.158.119 09/10 15:38
→ pIghoMe:公式解x=(-b+or-(b^2-4ac)^1/2)/2a175.181.142.166 09/10 15:38
→ harebuta:收到紅包感謝~~ 218.210.35.198 09/10 15:39
推 johnny790701:收到感謝 辛苦了 118.166.66.135 09/10 15:39
推 as259678:收到 謝謝^^ 125.228.109.83 09/10 15:40
推 Dr8:收到122.124.175.187 09/10 15:40
→ jason1218:第一名80P，第二三名因同分皆得50P122.126.233.216 09/10 15:41
→ jason1218:每得1分也可得1P~~122.126.233.216 09/10 15:41
→ jason1218:(第一次主持請多指教~~)122.126.233.216 09/10 15:42
推 killuaz:看來要速度與準度兼具才能玩XDD 114.42.105.163 09/10 15:45