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觀察可知,第三個數和第二個數的和是第一個數的二倍(0的二倍還是0),你可以利用這個規律直逐個往前推出第十個數是1026如果用數列推導則設原數列為An,根據規律(An+1)+An=2(An-1),兩邊同加An可得(An+1)+2(An)=(A…
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