Answer:
Step-by-step explanation:
it's about 18, as per the graph

As

, the sequence

converges to zero.
If you're talking about the infinite series

well we've shown by comparison that this series must also converge because we know any geometric series

will converge as long as

.
Answer:
210
Step-by-step explanation:
10+10+1=21
21 x 10=210
Answer:
11 years old
Step-by-step explanation:
If four brothers have the average age 6, then the sum of their ages is

years.
Let x years be the age of sister. If four brothers and their sister have the average age 7, then

Multiply this equation by 5:

The sister is 11 years old.
Answer:
Is that Deltamath?
Step-by-step explanation: