→ ex951753 :歸納法 答案是2 11/14 04:50
→ ex951753 :define * = ^(1/2) 11/14 04:52
→ ex951753 :(2+2*)* > x* 11/14 04:52
→ ex951753 :suppose ak+1 > ak 11/14 04:53
→ ex951753 :ak+2 = (2+ak+1)* > (2+ak)* = ak+1 QED 11/14 04:54
→ rfvbgtsport :感謝大大 11/14 13:46