公务员数列题1,6,20,56,144,( ) A.256 B.312 C.352 D.384 3,2,11,14,( ) 34 A.18 B.21 C.24 D.27 1,2,6,15,40,104,( ) A.329 B.273 C.225 D.185 2,3,7,16,65,321,( ) A.4546 B.4548 C.4542 D.4544 1 1/2 6/11 17/29 23/38 ( )A.117/191 B.122/199 C.28/45 D.31/47
问题描述：
公务员数列题
1,6,20,56,144,( )
A.256 B.312
C.352 D.384
3,2,11,14,( ) 34
A.18 B.21
C.24 D.27
1,2,6,15,40,104,( )
A.329 B.273
C.225 D.185
2,3,7,16,65,321,( )
A.4546 B.4548
C.4542 D.4544
1 1/2 6/11 17/29 23/38 ( )
A.117/191 B.122/199
C.28/45 D.31/47
答
1.C6=1x2+4 20=6x2+8 56=20x2+16 144=56x2+32 144x2+64=288+64=352 2.D分奇偶项来看：奇数项 平方+2 ；偶数项 平方-23 = 1^2 +22 = 2^2 -211= 3^2 +214= 4^2 -2（27）=5^2 +234= 6^2 -2 3.B273几个数之间的差为：1 4...