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Simplifying f(x) = 2x + -1cos(3x) Multiply f * x fx = 2x + -1cos(3x) Remove parenthesis around (3x) fx = 2x + -1cos * 3x Reorder the terms for easier multiplication: fx = 2x + -1 * 3cos * x Multiply -1 * 3 fx = 2x + -3cos * x Multiply cos * x fx = 2x + -3cosx Reorder the terms: fx = -3cosx + 2x Solving fx = -3cosx + 2x Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Divide each side by 'x'. f = -3cos + 2 Simplifying f = -3cos + 2 Reorder the terms: f = 2 + -3cos
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