vanessarivera12 vanessarivera12
  • 16-04-2018
  • Mathematics
contestada

What is the Pattern 4,25,130,655

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pogbatheosa
pogbatheosa pogbatheosa
  • 16-04-2018
somewhere a round six

i think 6.25
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geerky42
geerky42 geerky42
  • 16-04-2018
This pattern looks complicated so it could be anything. One possible pattern is

 a(n) = ( 21·5ⁿ - 25 ) / 20

So pattern starts at n=1 and sequence would be 4, 25, 130, 655, 3280, ...
Answer Link

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