Question

can someone please help me find the inverse of f(x) = -3x + 21. and determine whether the inverse is a function, and state its domain and range.

Answer 1

\[a)f^{-1} (x)=-\frac{ 1 }{ 3 }x+7\]
^not a function^
\[b)f^{-1} (x)=\frac{ -x+7 }{ 3 }\]
^not a function^
\[c)f^{-1} (x)=-\frac{ 1 }{ 3 }x+7\]
^^function; D: all real numbers; R: all real numbers.^^
\[d)f^{-1} (x)=\frac{ -x+7 }{ 3 }\]
^^function; D: all real numbers; R: all real numbers.^^