What are the explicit equation and domain for a geometric sequence with a first term of 2 and a second term of −8

15 points ! ~ see if you know the answer to both you!

In what form is the following linear equation written y=9x+2

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.