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Question 233543: find the domain the x2 the 2 is squared
p(x)= x2 + y
Answer by rapaljer(4671)   (Show Source):
You can put this solution on YOUR website! Domain means "What values of x are allowed in the equation?" Basically, you are not allowed to divide by zero or have negative values inside square roots. In this case, there are NO denominators, NO radicals, so there are NO RESTRICTIONS. Therefore, any value of x is allowed. The domain is ALL REAL VALUES OF X, or (-inf, inf).
For additional explanation on Domain and Range, please see my own website. Do a "Bing" or "Google" Search for my last name "Rapalje", and look for "Rapalje Homepage" near the top of the search listing. From my Homepage, look for the link near the top of the page "MATH IN LIVING COLOR", choose "College Algebra", and look in Chapter 2 for the topic "Functions, Domain and Range".
See also my video, taken a few years ago of me teaching this topic. To see the video (it's all FREE!), from my Homepage, look for "Rapalje Videos". There are actually TWO videos, one that was done in my Intermediate Algebra class, and one that was done in my College Algebra class. Choose the level you prefer. I call the "Intermediate Algebra" video "FDR 'Light' ". The explanation is somewhat "non-traditional", and my students found it easier to understand than the traditional textbooks.
Dr. Robert J. Rapalje, Retired
Seminole State College of Florida
Altamonte Springs Campus
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