Exercises 88–90 will help you prepare for the material covered in the next section. Consider the sequence whose nth term is a_n = (3)5ⁿ Find a₂/a₃, a₁/a₂, a₄/a₃ and a₅/a₄ What do you observe?

Exercises 88–90 will help you prepare for the material covered in the next section. Use the formula an = a₁3^(n-1) to find the seventh term of the sequence 11, 33, 99, 297,...

Write a recursive formula for the geometric sequence $\(\left\]\lbrace\)18,6,2,\(\frac\)23,\(\ldots\[\right\]\rbrace\)$.

Find the $10^{\(\th\)}$ term of the geometric sequence in which $a_1=5$ and $r=2$.