Question

If f(x) = 3x + 1, then f(a + h) - f(a) =

Answer 1

f(a+h) is 3(a+h) + 1 because you treat (a+h) just like the "x" in an f(x) function

Then you need to write f(a) also... f(a) = 3a+1

so write it all together to get f(a+h) - f(a)