2.1,2.2,4.1,4.4,16.1()

9,30,69,132,225,()A.354 B.387 C.456 D.540

单项选择题9,30,69,132,225,()

1,121,441,961,1681,()A.2401 B.2601 C.3721 D.4961

单项选择题1,121,441,961,1681,()

-3,-1,3,11,27,()A.29 B.39 C.49 D.59

单项选择题-3,-1,3,11,27,()