If and ,…

MATHEMATICS · Single correct · A Level · Mathematics · Exponentials and logarithms · Exponentials and logarithms

Problem

\log x + \log y = \log(x + y)

and

y = f(x)

, then

y =

(a)

\frac{x}{x-1}

(b)

\frac{x}{x+1}

(c)

\frac{x-1}{x}

(d)

\frac{x+1}{x-1}