Show that the function \( f \) on \( A=R-\left\{\frac{-4}{3}\right\...

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Show that the function \( f \) on \( A=R-\left\{\frac{-4}{3}\right\} \) into itself, defined by
P \( f(x)=\frac{4 x}{(3 x+4)} \) is one-one and onto. Hence, find \( f^{-1} \).
\( \mathrm{W} \)
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