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    				| 1. | A straight line cuts intercepts from the axes of coordinates the sum of whosereciprocals is a constant. Show that it always passes though as fixed point. | 
| Answer» `x/a+y/b=1` `1/a+1/b=alpha` `1/a=alpha-1/b` `(alpha-1/b)x+y/b=1` `1/b(y-alpha)+(alphax-1)=0` `alpha^2-1=0` `L_1=y=lambda=0` `y=1/lambda(11/alpha,1/alpha)`. | |