Hint for Section 8.1 Question 4

4. Given the sequence 5, 10, 20, 40, ... , 5 · 2^k, ... for  k0, write out an explicit formula for the nth term, a_n, and the (n-1)th term, a_n-1.

Then show that these terms satisfy the recurrence relation  a_n = 2 · a_n-1  for all integers n1.

Back to Section 8.1
Full solution