Determine if a sequence is arithmetic or geometric : $ 1, 2, 4, 8, ... $.
What is the next term in the following sequence : $ 1, 5, 9, 13, ... $
What is the value of x? $$ \frac{2}{3}, 1, \frac{3}{2}, \frac{9}{4}, x $$
What is the $n^{th}$ term of the sequence? $$ 2, 6, 10, 14, 18, ...$$
Find the general expression for the arithmetic sequence? $$ \frac{5}{2}, 5, 10, 20, . . . $$
Find the first five terms of the sequence where $ a_n = 2 n^2 - \dfrac{1}{n} $.