3. For f(x) = cos(x), suppose we have sequences {an} and {bn} defined by an = bn = = f(2n + 1). (a) Does limx→∞ f (x) exist? Why? (b) Evaluate a1, A2, A3, A4, A5 (c) Does {an} converge? If so, what is the limit? (d) Does {bn} converge? If so, what is the limit? (e) Does {f(n)} converge? If so, what is the limit? f(2n) and

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