Question: please answer this An electric current, when owing in a circular coil of radius r, exerts a force kx (x2 + r2)5/2 on a small

please answer this

An electric current, when owing in a circular coil of radius r, exerts a force kx (x2 + r2)5/2 on a small magnet located a distance x above the center of the coil. Determine the value of x when P is to be maximized at r = 6m. Note that k is a proportionality constant. F=

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