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： 

• 試一下第二個吧。 -wxcfan123- ♂ (260 bytes) () 10/20/2012 postreply 13:40:50

• 回複：試一下第二個吧。 -藍糊塗- ♂ (233 bytes) () 10/20/2012 postreply 17:44:44

• 第一個的試解： -calligraphy- ♂ (283 bytes) () 10/20/2012 postreply 18:44:30

• 回複：第一個的試解： -藍糊塗- ♂ (29 bytes) () 10/20/2012 postreply 19:56:37

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