let f(x)=x+5. what is f(x+3)
IF f(x) = x + 5... THEN: f(x + 3) = (x + 3) + 5 = x + 8Let's see an example:f(6) = 6 + 5 = 11f(6) = f(3+3) = 3 + 8 = 11