If `x=a t^2,\ \ y=2\ a t` , then `(d^2y)/(dx^2)=` `-1/(t^2)` (b) `1/(2\ a t^3)` (c) `-1/(t^3)` (d) `-1/(2\ a t^3)`

If x=a t^2,\ \ y=2\ a t , then (d^2y)/(dx^2)= (a) -1/(t^2) (b) 1/(2\ a t^3) (c) -1/(t^3) (d) -1/(2\ a t^3)

If x=a t^2,y=2a t , then (d^2y)/(dx^2) is equal to (a) -1/(t^2) (b) 1/(2a t^2) (c) -1/(t^3) (d) 1/(2a t^3)

If x=at^(2),y=2at, then (d^(2)y)/(dx^(2))=-(1)/(t^(2))(b)(1)/(2at^(3))(c)-(1)/(t^(3))(d)-(1)/(2at^(3))

If x=at^(2),y=2at, then (d^(2)y)/(dx^(2)) is equal to ( a )-(1)/(t^(2))( b) (1)/(2at^(2))(c)-(1)/(t^(3)) (d) (1)/(2at^(3))

If x = 2/t^(2), y = t^(3)-1, (d^(2)y)/(dx^(2) ) =

If x=t^(2) and y=t^(3)+1 , then (d^(2)y)/(dx^(2)) is

If x=t^(2) and y=t^(3)+1 , then (d^(2)y)/(dx^(2)) is

If x = (2/ t ^(2)), y = t ^(3) -1, then (d ^(2) y)/(dx ^(2))=

If x=t^(2),quad y=t^(3), then (d^(2)y)/(dx^(2))=3/2(b)3/4t(c)3/2t(d)3t/2

If x=t^(2),y=t^(3), then (d^(2)y)/(dx^(2))=(a)(3)/(2)(b)(3)/((4t)) (c) (3)/(2(t)) (d) (3t)/(2)