问题描述:
设数列an满足a1=a2=1,a3=2,且对正整数n都有an·an+1·an+2·an+3=an+an+1+an+2+an+3,
,求a1+a2+a3+···+a100的值
,求a1+a2+a3+···+a100的值
问题解答:
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问题描述:
问题解答:
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