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#1 2006-10-10 04:45:34

unique
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Registered: 2006-10-04
Posts: 419

domain of f

if f(x) = 1/ x - 2
find the domain of f
i cant put the the way of set notation
but in written form it can be

the domain of f is teh set of all real numbers x such that x is not equal to two


Desi
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#2 2006-10-10 04:52:21

luca-deltodesco
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Registered: 2006-05-05
Posts: 1,470

Re: domain of f

i think thats right


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#3 2006-10-10 04:52:22

Prakash Panneer
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Registered: 2006-06-01
Posts: 110

Re: domain of f

Given that,

f(x) = 1/x-2

The domain of the given function is  .......-2, -1, 0, 1, 3, 4, .......... x is not equal to 2.

That is set of all real numbers.(except 2).

up You are right.

Last edited by Prakash Panneer (2006-10-10 04:52:59)


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#4 2006-10-10 04:54:54

unique
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Registered: 2006-10-04
Posts: 419

Re: domain of f

AWESOME
thanks


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#5 2006-10-10 05:06:09

unique
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Registered: 2006-10-04
Posts: 419

Re: domain of f

ok for this one
find the domain of teh function defined by the following equation:

f(x) = 1/ x^2 - x

would the way i did the first problem be teh same way that i have to do this problem?


Desi
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#6 2006-10-10 05:16:05

mathsyperson
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Registered: 2005-06-22
Posts: 4,900

Re: domain of f

You do that one in a similar way to the first one. The function is defined for any value that doesn't make the denominator equal to 0.

This time the denominator is a quadratic, so it's a little bit harder to find out what values of x aren't allowed. But it's still fairly simple to find out that the roots of that equation are 0 and 1.

Therefore,


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#7 2006-10-10 05:32:15

unique
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Registered: 2006-10-04
Posts: 419

Re: domain of f

oh ok..thanks = )


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#8 2006-10-10 10:10:13

Ricky
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Registered: 2005-12-04
Posts: 3,791

Re: domain of f

If you wish to use formal set notation, it would be:

Or


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#9 2006-10-10 11:09:04

unique
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Registered: 2006-10-04
Posts: 419

Re: domain of f

thanks ricky


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