1. 0,2,24,252,3120,()
A.7776 B.1290 C.46650 D.1296
2. 20/9,4/3,7/9,4/9,1/4,()
A. 5/36 B. 7/36 C. 1/9 D. 2/9
参考答案与解析:
1. C【解析】0+1=1--1^3,2+2=4--2^2,24+3=27--3^3,252+4=256--4^4,3120+5=3125--5^5,6^4-6=46656-6=46650
2. A【解析】依次化为80/36,48/36,28/36,16/36,9/36。看分子:80,48,28,16,9是2级等差数列。相减得32,20,12,7;再减12,8,5;再减得4,3则下一个为2。所以是5/36
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