Use Recursion Formulas
-$a _ { 1 } = 5$ and $a _ { n } = 3 a _ { n - 1 }$ for $n \geq 2$
A) $5,15,45,135$
B) $5,14,13,12$
C) $12,36,108,216$
D) $5,17,47,137$

Question

Quizplus · Accepted Answer

The given recursion formula starts with $a_1 = 5$ and each subsequent term is three times the previous one ($a_n = 3a_{n-1}$). Starting with 5, multiplying by 3 for each next term gives 5, 15, 45, 135, which matches option A.

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

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