A. 4x/(1+x2)2sin 2 (1-x2/1+x2)
B. 4x/(1-x2)2sin (1-x2/1+x2)
C. - 4x/(1+x2)2sin 2 (1-x2/1+x2)
D. 4x/(1-x2)2sin 2 (1-x2/1+x2)
If y=e-kx/2(a cos nx+b sin nx) then y2+ky1+(n2+k2/4)y=
d/dx{(2x-3)/(3x+1)}=
If y2=(x-a)(x-b) then d3/dx3[(d2y/dx2)-2/3]=
If y=(5x+7/2x-3) then y2=
d/dx{Tanxn+Tannx+Tan-1(a+xn/1-axn)}=
d/dx{xn+1/xn}=
If y=e-x cos x then y4=
If ay4=(x+b)5then 5yy2=1
d/dx{Tan-1(a+bcos x/b+a cos x)}=
d/dx{x√a2+x2+a2Sinh-1(x/a)}=