Maxima minima


@pratimejaiswal
the given curve is hyperbola.
for hyperbola$x^2/a^2  y^2/b^2=1$
any line y=mx+c is tangent if$c^2= a^2m^2b^2$ ......(1)
. so now perpendicular to 5x+2y10=0 means slope of tangent is 2/5
use in 1