Question 1035546
Write an explicit formula for the following arithmetic sequence -4,-1,2,5... 
{{{a[n] = -4 + 3(n-1) = 3n-7}}} for n = 1,2,3,4,...

Write a recursive formula for the following arithmetic sequence -4,-1,2,5... 
{{{a[n] = a[n-1] + 3}}} for n = 2,3,4,5,...


Write an explicit formula for the following geometric sequence 1/2,3/2,9/2... 
{{{a[n] = (1/2)*3^(n-1)}}} for  n = 1,2,3,4,...

Write a recursive formula for the following geometric sequence 1/2,3/2,9/2...
{{{a[n] = 3a[n-1]}}} for  n = 2,3,4,5,...