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Separation of variables. Multiply both sides by g. Pretend d x is a number that can be moved to the right. Integrate both sides from x = x 0 to x f. Pretend integral signs are meaningful actions, distinct from d f and d x , that can be slapped onto both sides of an equation.
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Separation of variables Multiply both sides by g Pretenddx is a number that can be moved to the right. Integrate both sides from x=x0 to xf Pretendintegral signs are meaningful actions, distinct from df and dx, that can be slapped onto both sides of an equation. Apply a change of variables to the LHS