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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Deepak singh 1 Best Answer
Refer attached option a and b are correct
how do you know that 47 is the max. value?
lagrange multiplier gives always extremum values . It is either maximum or minimum . Now since there exist a point where f(x,y) attains value less than 47 implies its not minimum . So 47 is maximum value .