Find a Power Series Representation For $\ln \left( 1 + x ^ { 2 } \right)$

question 142

Essay

Find a power series representation for $\ln \left( 1 + x ^ { 2 } \right)$ .Hint: What is $\frac { d } { d x } \ln \left( 1 + x ^ { 2 } \right)$ ?

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