Let be a positive, continuous, and decreasing function for x 1, such that a n = (n). Use a graph to rank the

Let ƒ be a positive, continuous, and
decreasing function for x ≥ 1, such that a_n = ƒ(n). Use a graph to rank the following quantities in decreasing order. Explain your reasoning.

(a)

(b)

(c)

7 n=2 an