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In the geometric pattern below, n represents the number of blocks in the bottom row of each figure.

n = 1
n=2
Write a function that models the total number of blocks in terms of n.
OA f(1) = 2; f(n) = f(n-1) + 2n; for n ≥ 2
OB. f(1) = 1; f(n) = f(n-1) + 2n; for n ≥ 2
Oc f(1) = 1; f(n) = f(n-1) + n; for n ≥ 2
OD. f(1) = 2; f(n) = f(n-1) + 4n; for n ≥ 2
n=3

User MarckK
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D. f(1)=2;f(n) = f(n-1) + 4n; for n> 2.
User Pierre Buyle
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