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I do not understand how one got 7, 20, 39, 64, 95. Please explain.
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I do not understand how one got 7, 20, 39, 64, 95. Please explain.

I do not understand how one got 7, 20, 39, 64, 95. Please explain.-example-1
User Shant Dashjian
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n is 1,2,3,4,5
3n^2+4n we replace n with 1 and 3×1^2+4×1=7
we replace n now with 2 and 3×2^2+4×2=20 and so on
User Russell Maxfield
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