6. Find the curvat at x = 0. 7. Find the curvature of the plane y = -- cos(r) + e uck cverune 8. Find the maximum curvature of y Inx. 9. Find the tangential component aT and normal component aN for 3ti tj + tk. r(t) 10. Let a(t) = 2t i+ ej+ cos (t) k denote the acceleration of a movi v(0) i+2j -k, find the particle's velocity v(t) at any time t. OS (a) Find the domain of f(x, y) = In(2-1) 2y. (b) Sketch the graph of f(x, y) = 6- 12. Find the limit of show it does not exists. (a) 4 Iy lim (xy)(0,0) T + ys (b) xy y lim (ry)(1,0) ( 1)2 +y2 en the arc lenath 1 for all t

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