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Consider the given toothpick figures.
The perimeter of Figure 1 =
⇒ 4 toothpicks.
The perimeter of Figure 2 =
⇒ 10 toothpicks.
The perimeter of Figure 3 =
⇒ 16 toothpicks.
Write a recursive formula for the perimeter of the nth figure.
an = an - 1 + 6 where a1 = 4
an = n2 where a1 = 1
an = an - 1 + 9 where a1 = 4