1452x +4y -9=0
Sourup Nag can u please provide the solution?Upvote·0· Reply ·2013-06-23 01:38:11- Ranadeep Roy Is d correct? But I didnt find any use of that secant part.
- Ranadeep Roy differentiating the eqn of parabola, we get dy/dx=slope=-x
Now the required tangent passes through x=1/2, so we get the slope=-1/2
So, single point form eqn of a straight line will give
(y-2)/(x-1/2)=-1/2
- Ranadeep Roy differentiating the eqn of parabola, we get dy/dx=slope=-x
Now the required tangent passes through x=1/2, so we get the slope=-1/2
So, single point form eqn of a straight line will give
(y-2)/(x-1/2)=-1/2
- Rudra Sen Do we really need the secant part?
- Sourup Nag A is the correct answer, but can someone please provide a solution as well?
Soumyadeep Basu @Ranadeep, dy/dx=slope=-x. This x is not the x-coordinate of (1/2, 2) but the x-coordinate of the point through which the tangent passes. We do need the secant part as we can draw two tangents from any external point of a parabola.
