Q.5 the tangent plane to the surface z = yx2 + 3y2 at (1, 1,2) is given by (a) x-3y +z = 0 (b)x +3y 2z = 0 (c) 2x +4y -3z = 0 (d) 3x-7y +2z = 0 am 2018 mathe q.

Q.5 The tangent plane to the surface z = yx2 + 3y2 at (1, 1,2) is given by (A) x-3y +z = 0 (B)x +3y 2z = 0 (C) 2x +4y -3z = 0 (D) 3x-7y +2z = 0 AM 2018 Mathe Q.6 In R3, the cosine of the acute angle between the surfaces x2 + y2 +z2-9 = 0 and Z-x - y* +3 =0at the point (2, 1,2) is 10 10 (A) 5Z (B) 5 21 D) 2 C)