A. (1/1+x2)-(1/2(1+x)√x)
B. 1/2√(1+x2)
C. 1/√1+x2
D. 1/2√1-x2
If 3x2+4xy+2y2+x-8=0 and dy/dx at (1,1),(1,2),(2,-1),(-1,3) are respectively A,B,C,D then the descending order of A,B,C,D is
d/dx { log√(cosec x+1)-√(cosec x-1)}=
The derivative of (sin x)x w.r.to x is
If |x|<1 then d/dx[1+px/q+p(p+q)/2!(x/q)2+p(p+q)(p+2q)/3! (x/q)3+...]
Let f(x)=1/|x| for |x| ≤1, f(x)=ax2+b for |x|>1. If f is differentiable at any point, then
The derivative of Tan-1√(1+x2)-1/x w.r.to Tan-12x√(1-x2)/(1-2x2) at x=0 is
If cos x/2 . cos x/22. Cos x/23.... cos x/2n= sin x/2nsin (x/2n) then (1/22)sec2x/2+(1/24) sec2x/22...(1/22n)sec2x/2n=
If ax2+2hxy+by2=1 then (hx+by)3y2=
d/dx{Tan-1(acos x-bsin x/b cos x+a sin x)}=
If sin2 mx+cos2 ny=a2 then dy/dx=