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(3)0,7,26,63,()A.108B.116C.124D132(4)2/3,1/2,3/7,7/18,()A.5/9B.4/11C.3/13D.2/5(5)5,5,14,38,87,()A.167B.168C.169D.170

题目详情
(3) 0,7,26,63,( )
A.108 B.116
C.124 D 132
(4) 2/3,1/2,3/7,7/18,( )
A.5/9 B.4/11
C.3/13 D.2/5
(5) 5,5,14,38,87,( )
A.167 B.168
C.169 D.170
▼优质解答
答案和解析
(3);124
0=1^3-1; 7=2^3-1; 26=3^3-1; 63=4^3-1;
所以5^3-1=124(5^3表示5的3次方)