Question
Find a recursive rule for the sequence 3, 6, 12, 24, …
I can't decide if it's
a sub n= (2)n times sub n-1
or
a sub n= 1/2 times sub n-1
I can't decide if it's
a sub n= (2)n times sub n-1
or
a sub n= 1/2 times sub n-1
Answers
Steve
first, you might fix your typos. Your formulas are bogus.
Next, you can easily see that the values get bigger and bigger, so the 1/2 formula can't be right.
Your first try is right, but should be written
a(1) = 3
a(n) = 2*a(n-1) for n > 1
Next, you can easily see that the values get bigger and bigger, so the 1/2 formula can't be right.
Your first try is right, but should be written
a(1) = 3
a(n) = 2*a(n-1) for n > 1