Question

Find the domain????
in interval notation
7x-2/(x+7)(x-5)

Answer 1

where is this function undefined ?

Answer 2

Not sure, it just says to find the domain in he rational expression and answer in interval notation. It's from my pre-cacl class if that helps anything.

Answer 3

okay, so a function is undefined when the denominator is 0. Looking at this rational expression its undefined when x=-7 or x=5. right ?

Answer 4

Yes, I understand that part. :)

Answer 5

okay so your domain is everything except those parts.

Answer 6

Ohhh okay okay, I understand.

Answer 7

in interval notation you use parenthesis to show not included and hard brackets to show included and u to basically connect them.

Answer 8

So the answer would be (-infinity,-7) U (-7,2) U (-2,infinity)

Answer 9

5 not 2.

Answer 10

and yes.

Answer 11

Okay! Thank you sooo much!

Answer 12

no problem :)