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![[Post New]](/templates/default/images/icon_minipost_new.gif) 24 Mar 2008 13:56:09 IST
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Look at the figure. Eqn of tangent at (1,  ) x(1)+y( )=4 intercept at x axis is 4 hypotenuse = 4 By pythogores theorem 16=4+  where x is brown line x=  area =  =
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