Question

if,cos root y=x,then show (1-x^2)d^2y/dx^2-x dy/dx-2=0 ????????

Answer 1

\[\cos(\sqrt{y})=x\] right? i guess you have to find
\[\frac{dy}{dx}\] and
\[\frac{d^2y}{dx^2}\] and check. is there supposed to be a snap way to do it?

Answer 2

i've got ittt thanks