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
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试一下第二个吧。
-wxcfan123-
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10/20/2012 postreply
13:40:50
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回复:试一下第二个吧。
-蓝糊涂-
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(233 bytes)
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10/20/2012 postreply
17:44:44
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第一个的试解:
-calligraphy-
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10/20/2012 postreply
18:44:30
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回复:第一个的试解:
-蓝糊涂-
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10/20/2012 postreply
19:56:37
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x,y,z could be any numbers. for exp: x=y=z=0.
-jinjing-
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(203 bytes)
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10/20/2012 postreply
21:24:54