Question 1179192

{{{76.8}}}, {{{96}}}, {{{120}}}, {{{150}}}

obviously there is no common difference, so it's not arithmetic sequence

=> check if the sequence is geometric

{{{96/76.8=5/4}}}

{{{120/96=5/4}}}=> {{{r=5/4}}}


since {{{a[1]=76.8}}} and {{{r=5/4}}}, nth term formula

{{{a[n]=76.8*(5/4)^(n-1)}}}