Please help I’ll mark brainliest

17, 15, 13, 11

Step-by-step explanation:

With the equations given, we can find the first four terms.  The first term will be seven since f(1) = 17.

For n > 1, f(n) = f(n - 1) - 2

For n=2:  f(2) = f(2 - 1) - 2 = f(1) - 2 = 17 - 2 = 15

For n=3:  f(3) = f(3 - 1) - 2 = f(2) - 2 = 15 - 2 = 13

For n=4:  f(4) = f(4 - 1) - 2 = f(3) - 2 = 13 - 2 = 11

c. side angle side. u shares the same sides