20 ! the diagrams below (picture attached) represent the first three terms of a sequence.

assuming the pattern continues, which formula determines a(n) , the number of shaded squares in the nth term?

a a(n) = 4n

b a(n) = 8n + 4

c a(n) = 4n +8

d a(n) = 4n + 12

answer:

answer will be n=1

step-by-step explanation:

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