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.
Two problems
所有跟帖:
• 试一下第二个吧。 -wxcfan123- ♂ (260 bytes) () 10/20/2012 postreply 13:40:50
• 回复:试一下第二个吧。 -蓝糊涂- ♂ (233 bytes) () 10/20/2012 postreply 17:44:44
• 第一个的试解: -calligraphy- ♂ (283 bytes) () 10/20/2012 postreply 18:44:30
• 回复:第一个的试解: -蓝糊涂- ♂ (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