Please help me on this question​

Asequence is defined recursively by the formula  f(n  +  1)  =  f(n)  +  3 . the first term of the sequence is  –4. what is the next term in the sequence? –7–117

For the equations below which statement is true ?

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then