1,9,36,100,()
A.81
B.27
C.125
D.225
:1,9,36,100,225,()A.400 B.484 C.529D.441
:-81,-36,-9,0,9,36,()。A.49 B.64 C.81 D.100
-81,-36,-9,0,9,36,()。 A.49 B.64 C.81 D.100
1,9,36,100,()A.81 B.27 C.125 D.225
16,8.25,27.36,64.49,()A.65.25B.125.64C.125.81D.125.01
27,16,25,36,23,64,21,()A.81 B.100 C.121 D.19