Question

plz help

Answer 1

\[\frac{ \frac{ 1 }{ x }- \frac{ 1 }{ y} }{ \frac{ 1 }{ x ^{2} }- \frac{ 1 }{ y ^{2}} }\]

Answer 2

what do you need to know

Answer 3

is their any choices?

Answer 4

\[\frac{ 1 }{ x }-\frac{ 1 }{ y } = \frac{ y-x }{ xy }\]
\[\frac{ 1 }{ x^2 }-\frac{ 1 }{ y^2 } = \frac{ y^2-x^2 }{ x^2y^2 }\]
\[\frac{ \frac{ y-x }{ xy } }{ \frac{ y^2-x^2 }{ x^2y^2 } } = \frac{ x^2y^2 }{ y^2-x^2 } * \frac{ y-x }{ xy }\]
\[y^2-x^2 = (y-x)(y+x)\]
so... (xy) cancels and (y-x) cancels
this leaves.
\[\frac{ xy }{ y+x }\]

Answer 5

thanx

Answer 6

np!