Use Recursion Formulas
-$a _ { 1 } = 5$ and $a _ { n } = 4 a _ { n - 1 }$ for $n \geq 2$
A) $5,20,80,320$
B) $5,19,18,17$
C) $16,64,256,512$
D) $5,22,82,322$

Question

Quizplus · Accepted Answer

The sequence starts with $a_1 = 5$. Each subsequent term is 4 times the previous term. So, $a_2 = 4 \times 5 = 20$, $a_3 = 4 \times 20 = 80$, and $a_4 = 4 \times 80 = 320$, which matches option A.

Use Recursion Formulas - a1=5a _ { 1 } = 5a1​=5

Use Recursion Formulas
- $a _ { 1 } = 5$