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find domain:

f(x)=sqrt of 100-x^2
f(x)=sqrt of 2x^2+6x-8

1 answer

Think of f(x) as being pretty much like y. The domain is what you are allowed to put in for x in order to get some f(x) or y to come out. That is called the range, but, anyway, are there any x values that you can see as being troublesome? Which x's work fine and which do not? Are you supposed to express this using a certain notation or not? Does the problem itself specify any restrictions?
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