设f(x)在[a，b]上二阶可导，且f"(x)＞0，取x i ∈[a，b](i=1，2，…，，2)及k i ＞0(i=1，2，…，n)且满足k 1 +k 2 +…+k n =1．证明： f(k 1 x 1 +k 2 x 2 +…+k n x n )≤k 1 f(x 1 )+k 2 f(x 2 )+…+k n f(x n )．
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答案解析 查看更多优质解析 举报 这是一种习惯用法一般都用What does this word mean?如果用后一种表达方式应该是What's the meaning of this word? 解析看不懂?免费查看同类题视频解析查看解答 更多答案(3) 相似问题 what does this word mean为什么用does What does this word mean? what does this word...
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But what does 'nationality' mean? It is all very well objecting to national and racial stereotypes on the grounds that nations and races are maligned by their use. But what is it that is being maligned? N. Taylor 被引量: 4发表: 2007年 Martini Information Literacy: How does "anytime, ...
In the last paragraph, what does the writer mean by saying His friend said that he discovered a whole different side of John ?A.John had a different experience from Clare.B.The holiday deepened their friendship.C.Johns best friend was not very friendly t