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Given That f(x)=5ln2xf ( x ) = 5 \ln 2 x

Question 48

Multiple Choice

Given that f(x) =5ln2xf ( x ) = 5 \ln 2 x , find f1(x) f ^ { - 1 } ( x ) and give the domain and range of f1(x) f ^ { - 1 } ( x ) .


A) f1(x) =12ex5\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { 1 } { 2 } \mathrm { e } ^ { \mathrm { x } - 5 } , domain =(0,) = ( 0 , \infty ) , range =(,) = ( - \infty , \infty )
B) f1(x) =12ex/5\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { 1 } { 2 } \mathrm { e } ^ { \mathrm { x } / 5 } , domain =(,) = ( - \infty , \infty ) , range =(0,) = ( 0 , \infty )
C) f1(x) =12ex/5\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { 1 } { 2 } \mathrm { e } ^ { \mathrm { x } / 5 } , domain =(0,) = ( 0 , \infty ) , range =(,) = ( - \infty , \infty )
D) f1(x) =12ex5\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { 1 } { 2 } \mathrm { e } ^ { \mathrm { x } - 5 } , domain =(,) = ( - \infty , \infty ) , range =(0,) = ( 0 , \infty )

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