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2. Define f: [0, ) [0, ) by f(x) = x + 2x. Use the quadratic formula to guess a formula for an inverse

2. Define f: [0, ) [0, ) by f(x) = x + 2x. Use the quadratic formula to guess a formula for an inverse function g: [0, ) [0, ), and use it to prove that f is bijective by showing that go f = I[0,) and og = I[0,).

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