$\frac{1}{x}$ – $\frac{1}{y}$ = $\frac{1}{3}$ ( x,y $\neq$ 0) =>$\frac{x-y}{xy}$ = $\frac{1}{3}$ => 3( x- y) = xy => 3x – 3y -xy = 0 Bình luận
$\frac{1}{x}$ – $\frac{1}{y}$ = $\frac{1}{3}$ ( x,y $\neq$ 0)
=>$\frac{x-y}{xy}$ = $\frac{1}{3}$
=> 3( x- y) = xy
=> 3x – 3y -xy = 0