Question: (a) By graphing the function f(x) = (cos 2x - cos x) / x2 and zooming in toward the point where the graph crosses the

(a) By graphing the function f(x) = (cos 2x - cos x) / x2 and zooming in toward the point where the graph crosses the y-axis, estimate the value of limx-of(x). (b) Check your answer in part (a) by evaluating f (x) for values of x that approach 0

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