Mathematics

Mathematics

Problem

Area bounded by the line y=xy = x , curve y=f(x)y = f(x) , ( f(x)>x,∀x>1f(x) > x, \forall x > 1 ) and the lines x=1,x=tx = 1, x = t is (t+1+t2)−(1+2)(t + \sqrt{1+t^2}) - (1 + \sqrt{2}) for all t>1t > 1 . Find f(x)f(x) .

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