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Let the function f : R → R be defined by f(x) = 2x + cos x, then f(x) (a) has a minimum at x = π (b) has a maximum at x = 0(c) is a decreasing function (d) is an increasing function |
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Answer» Let the function f : R → R be defined by f(x) = 2x + cos x, then f(x) (a) has a minimum at x = π (b) has a maximum at x = 0 (c) is a decreasing function (d) is an increasing function |
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