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Dec 30, 2015
2, 7, 26, 101, 400, ?
D
I thought it might be 2•4=8-1=7, 7•4=28-2=26, 26•4=104- 3=101, 101•4=404-4=400, 400•4=1600-5=1595
On 12/30/15, jasmine wrote: > Please help with finishing pattern, > > 2, 7, 26, 101, 400, ?
On 12/30/15, jasmine wrote: > Please help with finishing pattern, > > 2, 7, 26, 101, 400, ?
And now, as an exercise for the reader
On 12/30/15, D wrote: > I thought it might be 2•4=8-1=7, 7•4=28-2=26, 26•4=104- > 3=101, 101•4=404-4=400, 400•4=1600-5=1595
Looks good > On 12/30/15, jasmine wrote: >> Please help with finishing pattern, >> >> 2, 7, 26, 101, 400, ?
give a formula that tells you what the nth term in the series i...See More
Looks good > On 12/30/15, jasmine wrote: >> Please help with finishing pattern, >> >> 2, 7, 26, 101, 400, ?
give a formula that tells you what the nth term in the series i...See More
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First number: times 4 minus 1, 2nd number: times 4 minus 2, 3rd number: times 4 minus 3, etc.
2 x 4 - 1 = 7 7 x 4 - 2 = 26 26 x 4 - 3 = 101 101 x 4 -4 = 400 400 x 4 -5 - 1595