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Please solve this problem with the elements of the definite integrals easily

Please solve this problem with the elements of the definite integrals easily 

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Grade:11

1 Answers

Aditya Gupta
2081 Points
2 years ago
you can simply draw the figure, write the eqn of normal and find the area in terms of r using integration. then differentiate the given fn wrt r and equate it to zero. this way thou shall find out the value of r for minimum area.
r= sqrt2 – 1
kindly approve :)

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