Question

Find the 7th of g.p with first term1/6 and common ratio 3. Solution. N=7 a=1/6r=3. Un =AR. N-1. Un=I/6×3. Un=1/6×36. Un=1/6×729. Un=729/6. Un=121.5. Un=122

Answer 1

a_7 = ar^6

not sure what all that other meandering is supposed to help with