Let f x 27x Which of the following best describes what happ

Let f (x) = 2/7-x Which of the following best describes what happens to f (x) as x approaches 7 from the right? f (x) decreases without bound. f (x) evaluates to 2/0. f(x) increases without bound. f (x) decreases towards 0.

Solution

Right to 7, we have 8,9,10... so on. All are greater than 7.

Hence, f(x) = -2/(x-7)

as x tends to 7, x-7 goes to 0 and f(x) = -2/0 tends to - infinite.

Therefore, f(x) decreases without bound. Option A.