A (1) show that the curves represented by -2 for different values of n, have a common tangent at the point (a, b). find the equation of the common tangent. (pu

a (1) Show that the curves represented by -2 for different values of n, have a common tangent at the point (a, b). Find the equation of the common tangent. (PU 1945, '66;, RU '64, "68,84 ; BU '61; MU '75, '84; AMIE 5 (ii) Find the points on the curve y=x-+3x +4 the tangent at which pass through the origin. (PU 1965