A. -2
B. 2
C. -1/2
D. 1/2
If x2+5xy+y2-2x+y-6=0 then y’’ at (-1,1) is
A function f:R→R satisfies the equation f(x+y)=f(x)f(y),x,y ε R and f(x)≠0 for any x εR. If f is differentiable at x=o and f'(0)=2 then for any x εR, f1(x)=
d/dx{x2+3x+6/(x+3)(x-5)}=
If x= acos3θ, y= asin3θ then d2y/dx2 at θ=π/4 is
If sin θ. Sin (2α+θ).sin(4α+θ)+...+sin(2nα+θ)= sin nθ/2n-1 where 2nα=π, then cot θ+cot(2α+θ)+...+cot(2nα+θ)=
If f(x)=x2+x2/(1+x2)+x2/(1+x2)2+...+x2/(1+x2)n+... then x=0
d/dx{1-cos 2x/3+2 sin 2x}=
If x= a(cos θ+θ sin θ), y=a(sin θ-θ cos θ)then dy/dx=
If sec θ-cos θ, y= secn θ- cosn θ then (dy/dx)2=
d/dx{Tan-1 1/√x2-1}=