Answer:
0
Explanation:
Find the following limit: 
lim_(x->∞) 3^(-x) n 
 
Applying the quotient rule, write lim_(x->∞) n 3^(-x) as (lim_(x->∞) n)/(lim_(x->∞) 3^x): 
n/(lim_(x->∞) 3^x) 
 
Using the fact that 3^x is a continuous function of x, write lim_(x->∞) 3^x as 3^(lim_(x->∞) x): 
n/3^(lim_(x->∞) x) 
 
lim_(x->∞) x = ∞: 
n/3^∞ 
 
n/3^∞ = 0: 
Answer: 0