A. (-2, -4)
B. (-2, -8)
C. (2, 8)
D. (2, 4)
The two curves 2x2+y2=20, x2-4y2+8=0
The equation of the tangent to the curve y2=4x+5 and which is parallel to0 y=2x+7 is
The equation of the tangent to the curve y2=4ax at (at2, 2at) is
The function tan-1(sin x) increases in
If f(x) =2x2+3x-5, x=3, δx=0.02, then δf=
The length of the subnormal of the curves y=a/2(ex/a+e-x/a) at any point is
A stone is thrown vertically up and height s reached in time t is given by the formula s=2t2+3t+1. The stone reaches the maximum height in time t =
If A, B, C, D are the lengths of normals to the curves 1.y=4x2 at (-1, 4) 2. Y=x3+1 at (1, 2) 3. Y=x3/2-x at (1,1) 4. 2x2+3xy-2y2=8 at (2, 3) then the ascending order of A,B,C,D is