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Determine I) the Domain of the Function, Ii) the Range f(x)=7x4f ( x ) = - 7 x - 4

Question 16

Multiple Choice

Determine i) the domain of the function, ii) the range of the function, iii) the domain of the inverse, and iv) the range of
the inverse.
- f(x) =7x4f ( x ) = - 7 x - 4


A) f(x) f ( x ) : D={xx>7},RD = \{ x \mid x > - 7 \} , R is all real numbers;
f1(x) :D={xx<7},R\mathrm { f } ^ { - 1 } ( \mathrm { x } ) : \mathrm { D } = \{ \mathrm { x } \mid \mathrm { x } < - 7 \} , R is all real numbers

B) f(x) :D={xx>7},R={yy>4}f ( x ) : D = \{ x \mid x > - 7 \} , R = \{ y \mid y > - 4 \} ;
f1(x) :D={xx<7},R={yy<4}\mathrm { f } ^ { - 1 } ( \mathrm { x } ) : \mathrm { D } = \{ \mathrm { x } \mid \mathrm { x } < - 7 \} , \mathrm { R } = \{ \mathrm { y } \mid \mathrm { y } < - 4 \}

C) f(x) f ( x ) : DD is all real numbers, R={yy>4}R = \{ y \mid y > - 4 \} ;
f1(x) \mathrm { f } ^ { - 1 } ( \mathrm { x } ) : D\mathrm { D } is all real numbers, R={yy<4}\mathrm { R } = \{ \mathrm { y } \mid \mathrm { y } < - 4 \}

D) f(x) f ( x ) : DD is all real numbers, RR is all real numbers;
f1(x) \mathrm { f } ^ { - 1 } ( \mathrm { x } ) : D\mathrm { D } is all real numbers, RR is all real numbers

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