3
in the geometric pattern below. n represents the number of blocks in the bottom row of each figure.
n =
1
n =
2
n
=
3
write a function that models the total number of blocks in terms of n.
a. f(1) = 2; f(n) = f(n − 1) + 2n; for n > 2
b. f(1) = 2; f(n) = f(n − 1) + 4n; for n > 2
c. f(1) = 1; f(n) = f(n − 1) + n; for n > 2
d. f(1) = 1; f(n) = f(n − 1) + 2n; for n > 2