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f(x) = square root of [1+x], g(x) = square root of [1-x]?
f+g
f-g
fg
f/g
and their domains, it's been about a year now since ive done these and im like confused as heck :/
even the book examples didnt help much, neither was the prof. notes i took down :S
plz help me remember how to do these again? thanks ahead of time
P.S. i dont know how to do that square root thingy on my computer, sorry
1 Answer
- 1 decade agoFavorite Answer
just remember these three rules!
1. you cannot divide by zero
2. you cannot take the square root (or any even root) of a negative number
3. you cannot take the log of a negative or zero
4. you cannot divide by zero
