If `ln(x+y)=4xy`. find `(d^2y)/dx^2 `
at `x=0`

If y=log(sin x), find (d^(2)y)/(dx^(2))

If y=|(log)_(e)x|, find (d^(2)y)/(dx^(2))

If log(x+y)=2xy then y'(0)=

If y=cosh(2x)log(x). Find (d^(2)y)/(dx^(2))

If y=x log x ,then (d^(2)y)/(dx^(2))=

If log(x+y)=2xy, then y'(0) is

If y=log (log x) then (d^2y)/(dx^2) is equal to

If sin ( x+y) +cos (x+y) =log (x+y) ,then (d^(2)y)/(dx^(2))=

If y=log tan((pi)/(4)+(x)/(2)), show that (dy)/(dx)=sec x. Also find the value of (d^(2)y)/(dx^(2)) at x=(pi)/(4)

If y=(log x)/(x) then (d^(2)y)/(dx^(2))=