几道数列题求解1.2,3,7,16,65,321,( )A.4546 B.4548 C.4542 D.45442.1 1/2 6/11 17/29 23/38 ( )3.0,0,6,24,60,120 ( )A.180 B.196 C.210 D.2164.2,3,7,45,2017 ( )A.4068271 B.4068273 C.4068275 D.40682775.2,2,3,4,9,32 ( )A.129 B.215 C.257 D.283
问题描述:
几道数列题求解
1.2,3,7,16,65,321,( )
A.4546 B.4548 C.4542 D.4544
2.1 1/2 6/11 17/29 23/38 ( )
3.0,0,6,24,60,120 ( )
A.180 B.196 C.210 D.216
4.2,3,7,45,2017 ( )
A.4068271 B.4068273 C.4068275 D.4068277
5.2,2,3,4,9,32 ( )
A.129 B.215 C.257 D.283
答
abadc
答
1.A 7=2^2+3 16=3^2+7 65=7^2+16 321=16^2+65 4546=65^2+3212.1/1、2/4、6/11、17/29、46/76可以看到,第二项的分子为前一项分式的分子+分母,分母为前一项的分母+自身的分子+1.所以答案为:122/1993.B 0=0^3-0 0=1^3-...