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找规律:5,10,26,65,170,_____:

[单选题]
找规律:5,10,26,65,170,_____:
  • 185
  • 290
  • 312
  • 442
5 = 22+1
10 = 32+1
26 = 52+1 (5=3+2)
65 = 82+1 (5=5+3)
170=132+1 (13=8+5)
所以 x = 212+1 =442
选D

发表于 2020-02-23 16:27:10 回复(0)