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Simplifying f(x) = -1 + -2cos(4x + pi) Multiply f * x fx = -1 + -2cos(4x + pi) Reorder the terms: fx = -1 + -2cos(ip + 4x) fx = -1 + (ip * -2cos + 4x * -2cos) fx = -1 + (-2ciops + -8cosx) Solving fx = -1 + -2ciops + -8cosx Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Divide each side by 'x'. f = -1x-1 + -2ciopsx-1 + -8cos Simplifying f = -1x-1 + -2ciopsx-1 + -8cos Reorder the terms: f = -2ciopsx-1 + -8cos + -1x-1
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