you can see the Function in the picture.

what is the way to find the Domain definition ?

thanks.

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- December 8th 2010, 02:56 AMZOOZhow to find the Domain definition of Function
you can see the Function in the picture.

what is the way to find the Domain definition ?

thanks. - December 8th 2010, 03:04 AMProve It
Factorise the denominator. The function will be continuous everywhere except where the denominator is 0.

- December 12th 2010, 02:29 AMZOOZ
YES i know if there 0 in the Denominator so the Factorise are not continuous but Can have more points in the denominator to compare it to zero .

how i find Them?

thanks. - December 12th 2010, 03:07 AMHallsofIvy
So your question

**really**is "How do I factor ?" It would have been better to say that in your first post.

"x" is an obvious factor: . Now the only possible zeros of are 1, -1, 7, and -7 (because if it were to factor as (x-a)(x-b)(x-c) the last term would be abc=-7- and the only integer factors of 7 are 1 and 7). Trying x= 1 in the polynomial we get . That tells us that x- 1 is also a factor. Dividing by x- 1 leaves which has**discriminant**( ) equal to so there are no more real number zeros of the polynomial. . - December 12th 2010, 06:56 AMZOOZ
thank you.

and yes i mean How do I factor.