If the length of subnormal is four times the length of subtangent at a point (3,4) on the curve y=f(x). The tangent at (3,4) to y=f(x) meets the coordinate axes at P and Q and the maximum area of triangle OPQ (where O is origin) is 4b2, then b=

If the length of subnormal is four times the length of subtangent at a

1.	If the length of subnormal is four times the length of subtangent at a point (3,4) on the curve y=f(x). The tangent at (3,4) to y=f(x) meets the coordinate axes at P and Q and the maximum area of triangle OPQ (where O is origin) is 4b2, then b=
Answer» If the length of subnormal is four times the length of subtangent at a point $(3, 4)$ on the curve $y = f (x)$ . The tangent at $(3, 4)$ to $y = f (x)$ meets the coordinate axes at $P$ and $Q$ and the maximum area of triangle $O P Q$ (where $O$ is origin) is $4 b^{2}$ , then $b =$