A convex mirror and a concave mirror each of focal length fare placed coaxially. They are separated by 4f and their reflecting surfaces face each other. A point object is kept on theprinciple axis at a distance x from the concave mirror such that final image after tworeflections, first on the concave mirror, is on the object itself. Find x in terms of f.

A convex mirror and a concave mirror each of focal length fare placed

1.	A convex mirror and a concave mirror each of focal length fare placed coaxially. They are separated by 4f and their reflecting surfaces face each other. A point object is kept on theprinciple axis at a distance x from the concave mirror such that final image after tworeflections, first on the concave mirror, is on the object itself. Find x in terms of f.
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