limx→ af(x) will be closer to f(a+2) thanf(a+3).
False
If the function we are considering behaves tha same way in the interval [a-3,a+3], the given
statement can be true. But if the function changes its behaviors considerably in that interval then we can't say anything about it.
Consider the function with the following graph.
In this case, limx→ af(x) is close to f(a+3) than f(a+2)
So the given statement is not always true.