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Author Topic: Problem 1 Variant C&D 2018F  (Read 3029 times)

Jing Yang

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Problem 1 Variant C&D 2018F
« on: October 14, 2020, 05:08:58 AM »
Are the last steps typos? Those are true if ln(a-b)=-ln(a+b). But I don't think the equation is true. Can anyone help me with that?
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