Question: In the theory associated with the magnetic field due to an electric current, the expression is found. By expanding (a 2 + x 2 )

In the theory associated with the magnetic field due to an electric current, the expression

1- X a + x


is found. By expanding (a2 + x 2)−1/2, find the first three nonzero terms that could be used to approximate the given expression.

1- X a + x

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