Prove that 1/OA + 1/OB = 2/OC . OB is the perpendicular bisector of the line segment DE, FA ⊥ OB

Class-10 Maths
Chapter-6, Triangles
In Fig, OB is the perpendicular bisector of the line segment DE, FA ⊥ OB and FE intersects OB at the point C. Prove that 1/OA + 1/OB = 2/OC
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