I am having some difficulty solving this question, any help would be greatly appreciated. Thx in advance!
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Originally Posted by Solid8Snake I am having some difficulty solving this question, any help would be greatly appreciated. Thx in advance! If $\displaystyle f(t)=\frac{t-x}{t+y}$, then $\displaystyle f(x+y)=\frac{x+y-x}{x+y+y}=\frac{y}{x+2y}$ $\displaystyle f(x-y)=\frac{x-y-x}{x-y+y}=-\frac{y}{x}$ Thus, $\displaystyle f(x+y)+f(x-y)=\frac{y}{x+2y}-\frac{y}{x}=\dots$ Can you take it from here?
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