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Provide an Appropriate Response f(x)f ( x ) And g(x)g ( x )

question 193

Essay

Provide an appropriate response.
-Assume that f(x)f ( x ) and g(x)g ( x ) are two functions with the following properties: g(x)g ( x ) and f(x)f ( x ) are everywhere continuo differentiable, and positive; f(x)\mathrm { f } ( \mathrm { x } ) is everywhere increasing and g(x)g ( x ) is everywhere decreasing. Which of the follow functions are everywhere decreasing? Prove your assertions.
i). h(x)=f(x)+g(x)h ( x ) = f ( x ) + g ( x )
ii). j(x)=f(x)g(x)j ( x ) = f ( x ) \cdot g ( x )
iii). k(x)=g(x)f(x)\mathrm { k } ( \mathrm { x } ) = \frac { \mathrm { g } ( \mathrm { x } ) } { \mathrm { f } ( \mathrm { x } ) }
iv). p(x)=[f(x)]g(x)p ( x ) = [ f ( x ) ] g ( x )
v). r(x)=f(g(x))=(fg)(x)r ( x ) = f ( g ( x ) ) = ( f \circ g ) ( x )


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