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Simplifying f(x) = 3xln(7x) + -3x Multiply f * x fx = 3xln(7x) + -3x Remove parenthesis around (7x) fx = 3lnx * 7x + -3x Reorder the terms for easier multiplication: fx = 3 * 7lnx * x + -3x Multiply 3 * 7 fx = 21lnx * x + -3x Multiply lnx * x fx = 21lnx2 + -3x Solving fx = 21lnx2 + -3x Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Divide each side by 'x'. f = 21lnx + -3 Simplifying f = 21lnx + -3 Reorder the terms: f = -3 + 21lnx
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