:4,7,20,52,()
A.142
B.261
C.385
D.276
-8,-4,4,20,()A.60 B.52 C.48 D.36
2, 7, 20, 57, 166, ()。A· 490 B. 491 C. 276 D. 288
4,7,20,52,() A.142B.261C.385D.276
定义4△5=4+5+6+7+8=30,7△4=7+8+9+10=34,按此规律,(26△15)+(10△3)的值为() A.528B.52
2,7,20,57,166,()。A.490B.491C.276D.288
4,7,20,52,()A.142B.261 C.385D.276