:1,9,36,100,225,()
A.400
B.484
C.529
D.441
400,225,100,25,()。 A.9 B.10 C.1 D.0
1,9,36,100,225,() A.400B.484C.529 D.441
1,9,36,100,() A.81 B.27 C.125 D.225
1,9,36,100,()A.81 B.27 C.125 D.225
243,-9,234,-18,(),-36,180A.225B.216C.207D.198
-1,1,4,9,25,() A.196 B.225 C.256 D.289