Two problems

1)Find the pattern: In the sequence 110, 20, 12, 11, x, 6, y, z, . . . . What is the pattern, and what are
x, y, z?

2)√z means sqrt in the following, prove that

Given that x, y, z ≥ 0, x + y + z = 3, show that √x + √y + √z ≥ xy + yz + zx.

所有跟帖: 

试一下第二个吧。 -wxcfan123- 给 wxcfan123 发送悄悄话 (260 bytes) () 10/20/2012 postreply 13:40:50

回复:试一下第二个吧。 -蓝糊涂- 给 蓝糊涂 发送悄悄话 (233 bytes) () 10/20/2012 postreply 17:44:44

第一个的试解: -calligraphy- 给 calligraphy 发送悄悄话 (283 bytes) () 10/20/2012 postreply 18:44:30

回复:第一个的试解: -蓝糊涂- 给 蓝糊涂 发送悄悄话 (29 bytes) () 10/20/2012 postreply 19:56:37

x,y,z could be any numbers. for exp: x=y=z=0. -jinjing- 给 jinjing 发送悄悄话 (203 bytes) () 10/20/2012 postreply 21:24:54

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