14(20x) > 2(174.38) note that the greater than should really be a greater than or equal to symbol, I just don't have it on my keyboard.
-(-6) in simplest form is +6 because a - times a - is a +
f(1) = 4(1)-9 = 4-9 = -5
f(2) = 4(2)-9 = 8-9 = -1
f(3) = 4(3)-9 = 12-9 = 3
f(4) = 4(4)-9 = 16-9 = 7
Set would be {-5, -1, 3, 7 .....}
Answer:

Step-by-step explanation:
Divide by the coefficient of the r factor, then take the square root.
