Given the arithmetic sequence an = 4 + 8(n − 1), what is the domain for n?

3x^3-x^2+6x-9

answer: domain and range mean all possible values of x and y that could be substituted to the inequality. a solution means all possible values that make the inequality statement true. so while the range is still all real numbers, the solution is the shaded area, for which y will always be greater than the line of the function.