Question

what is tye inverse of f (x)=7x-1/2

Answer 1

put f(x) = y
\[y=7x-\frac{ 1 }{ 2 }\]
then put \[x=7y-\frac{ 1 }{ 2 }\]
\[7y=x+\frac{ 1 }{ 2 }\]
\[y=\frac{ x+\frac{ 1 }{ 2 } }{ 7 }\]
rewrite it as \[f(x)^{-1} \]\[f(x)^{-1} =\frac{ x+\frac{ 1 }{ 2 }}{ 7 }\]

Answer 2

get it ??