Question

PLEASE HELP. Problem on geometric sequences. Attachment below.

Answer 1

@whpalmer4
@ganeshie8

Answer 2

a3=7
a4=7*r
a5=7*r*r
a6=7*r*r*r
a7=7*r*r*r*r
a8=*r*r*r*r*r*r

Answer 3

\(\{a,ar,ar^2,ar^3,ar^4...\}\)

Answer 4

in general, the formula for term \[a_n = a_1r^{n-1}\]we know that \[a_3 = 7,~r=2\]so\[a_3 = 7 = a_12^{3-1}\]\[7=a_12^2\]You should be able to solve that for \(a_1\) and construct the formula for any term in this sequence. Use that formula to find the 8th term, which is \(a_8\)