问题
单项选择题
-2,-4,0,16,( )
A.25
B.32
C.50
D.64
答案
参考答案:C
解析: -2=-2×1,-4:-1×4,0=0×9,16=1×l6,( )=2×25=50,前面为等差数列-2,-1,0,1,2,后面为平方数列1,4,9,16,25。
-2,-4,0,16,( )
A.25
B.32
C.50
D.64
参考答案:C
解析: -2=-2×1,-4:-1×4,0=0×9,16=1×l6,( )=2×25=50,前面为等差数列-2,-1,0,1,2,后面为平方数列1,4,9,16,25。