[分析] The convergence of sequences
Let (xn) be a sequence and set yn=(x1+x2+...+xn)/n (the average of xn)
Prove that,
If xn->x (converges to x)
then yn->x
很直觀的結論
可是卡了快一天...囧
寫不下去了...先感謝各位的幫忙!
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