#5 Complex Analysis

x. 2). So the LHS and RHS of (3) have the same derivative.) Now substituting . x = 1 into (3) we get (4)1 – 1/3 + 1/5 – 1/7 + … = arctan 1 = /4. What’s wrong with this proof?..?.. [write answers on the board] 1. What does an expression like . x – x. 3/3 + x. 5/5 – x. 7/7 + … ................
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