FX = X 1) . None of the above . Question 7 Your answer is CORRECT. Find an equation in x , y . 2 for the plane that passes through the given points . . - 1 . 2 ). 8(3 , - 2 , 3 ) . R ( 2 . 0 , 2 ) ) exponentials -x+2y+32-3-0 PG ( 21 - 1, 0 ) XC1 e ) - parabolas a) - 2x+ +32-3-0 1) None of the above . c) -x-y+32-6-0 . . . Question 16 d) - x+ - 32+8-0 Your answer is INCORRECT. e) -xty+32-4=0 ( X -J) +(ge ) + 3 Calculate fx (x , y, z ) . None of the above. - Xtaty $2+32 - 6 Question 8 Your answer is CORRECT. EXPO. Scalar parametric equations for the line tangent to the graph of b) " x - 15 42 8 5xx - 1 at the point (2, 1, -2) are: r ( t ) = ( 2 + + 2 ) i + ( 2 + 3+ + 1)j+ (8+41-2)k a ) ( x = 21+ 2,y = 3t+ 1,z =-2+41) f=-15yx5x b) O ( x = - 2+2t,y =1,z =41) e) of, - In * - 15yxe SAS c) O ( x =2 - 2ty = 31+ 1,z =-2-41) D None of the above. ( x = 2,y =1 - 31,2 =-2+81) e) O (x = 2+41,y =31+1,z=-4+41) Question 17 Your answer is CORRECT. f) None of the above. Calculate the second-order partial derivatives. 1(x , y ) - In (1 3x 7 + 342) Question 9 Your answer is CORRECT. Find the unit tangent vector and the principal normal vector, and an equation in x; y, z fi ( x2 + 3 2 )2 " point on the curve corresponding to the indicated value of t. r (t ) = ( 3 cos ( 2t) ) i+ (3 sin ( 2t) ) j+ 2tk b ) ( 2 + 3 2 ) 2 "