第二讲ppt.pdf - y y x2 1 Sn n 1 2 2 2 n n n 1 12 22 6n 3...

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求面积 x O 2 y x y 1 n 2 n 1 3 n 1 n n 2 2 2 1 1 2 1 n n S n n n n 2 2 2 3 1 2 1 6 n n 3 1 2 1 6 n n n n 2 2 2 3 1 6 n n n 2 1 1 1 3 2 6 n n 1 3
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数列极限的概念 l 0, , . i . m n n n n n n n n x A N n N x A A x A x n A x A x A x A n    为一数列, 为一实数,对 使得当 时, 则称数列 在 趋向于无 穷大时 , 为其 有极限或收敛 极限值(或说 收敛于 ),记 1) : . 2) : . N 度量数列与极限值的距离 与 相关,标示这变化的进程 x O
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lim 0, , . . . n n n x A N s t n N x A    时,有 N n N 1 1, 证明: >0, 时,
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