Answer: (D) [tex]\frac{y-x}{y+x}[/tex]
Explanation:
[tex]\frac{\frac{1}{x}-\frac{1}{y}}{\frac{1}{x}+\frac{1}{y}}=\frac{\frac{y-x}{xy}}{\frac{y+x}{xy}}=\frac{y-x}{y+x}[/tex]
Just a note on writing down these expressions: I recommend using parentheses whenever you can to avoid misinterpretation. An expression 1/x-1/y / 1/x+1/y could be interpreted by someone as 1/x-(1/y / 1/x)+1/y, which is a different thing.
Answer:
The correct answer is D. y-x/y+x
Step-by-step explanation:
I just took the unit test review. :)
Buena suerte
