What is the inverse function of $f(x)=2x+3$ ?

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Answer 1 · 2015-11-07T21:43:43

$f^(-1)(x)=(x-3)/2$

By definition, $y=f^(-1)(x)iff f(y)=x$

$iff2y+3=x$

$iffy=(x-3)/2$

$thereforef^(-1)(x)=(x-3)/2$

What is the inverse function of f(x)=2x+3f(x)=2x+3?