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![[Post New]](/templates/default/images/icon_minipost_new.gif) 17 Apr 2008 21:48:52 IST
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EQUATION OF ANY TANGENT TO PARABOLA IS GIVEN BY
y = mx + a/m
EQUATION OF ANY TANGENT TO ABOVE PARABOLA IS GIVEN BY
y = mx + 1/m............................1
now this is also a tangent to second parabola. so it should satisfy it
put the value of y from 1 in the equation of second
it will be quadratic in x
then put D = 0
this will give the value of m
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