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Each number is the sum of the previous two numbers. What were the first two numb
Each number is the sum of the previous two numbers. What were the first two numb
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2024-08-10
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问题
Each number is the sum of the previous two numbers. What were the first two numbers that started the series?
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答案
2.5
解析
(设19和81之间的数字为x,y,则19+x=y,x+y=81,得x=31,y=50。则后四个数分别为19,31,50,81。则前四个数从后往前可推知分别是12,7,5,2。)
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