Question 985102
a, 2*a, 2*2*a, 2*2*2*a, 2*2*2*2*a


{{{(2^4)a-a=45}}}, or the fifth term is greater than the first term by 45.
{{{16a-a=45}}}
{{{15a=45}}}

{{{15a(1/15)=45(1/15)}}}