http://img57.imageshack.us/img57/2617/domainsrq4.th.jpg

i have substituted the values and i know the answer for the first one but i dont know the rest, also they have to be done using set and interval notation, i have a rough idea but not quite sure...

so far i have...

http://img221.imageshack.us/img221/6...ofarzu8.th.jpg

please help me out :)

thanks