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Math Chapter Wise question with answer

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Question #51,978
Math Chapter Wise Statics And Dynamics English MCQ UPPSC Polytechnic Lecturer 2021(II)

Q.If the minimum of the surface area of revolution of a curve y = y(x) is () 2 1 x 2 x 2 y 1 y' dx π + ∫ then the curve is -

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