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 Post subject: are they equal?Posted: Fri, 18 May 2012 13:53:06 UTC
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True or false. The two functions f and g defined by

f(x) = 3x + 3 for x real and g(t) = 3t + 3 for t real and positive

are equal?

Thanks!

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 Post subject: Re: are they equal?Posted: Fri, 18 May 2012 13:54:56 UTC
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True or false. The two functions f and g defined by

f(x) = 3x + 3 for x real and g(t) = 3t + 3 for t real and positive

are equal?

Thanks!

What have you tried?

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 Post subject: Re: are they equal?Posted: Fri, 18 May 2012 15:50:23 UTC
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True or false. The two functions f and g defined by

f(x) = 3x + 3 for x real and g(t) = 3t + 3 for t real and positive

are equal?

Thanks!

if you draw the graph you will get a good idea that range of f and g are not same.more over g>3 where as f can take all real value.

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 Post subject: Re: are they equal?Posted: Fri, 18 May 2012 21:37:28 UTC
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Joined: Wed, 30 Mar 2005 04:25:14 UTC
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Location: Austin, TX
True or false. The two functions f and g defined by

f(x) = 3x + 3 for x real and g(t) = 3t + 3 for t real and positive

are equal?

Thanks!

No, it says explicitly that their domains are not the same, so they are not the same function.

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