11:43 3 2 D: . Q & D Grill .Ill 40%% Elaha Sarwary . . . Today, 9:07 AM 7. (T 4 Marks ) The tangent to the curve y=ax? +bx+2 at (1, 2 ) is parallel to the normal to the curve y=x +6x+10 at (-2,2). Find the values of a and b. ( A Normal is a line perpendicular to the tangent at that point.) 8. (T 2 + C 1 Marks ) Show that there are no tangents to the curve f(x) =- 5x + 2 x + 2 that have a negative slope. III O A