# Domain and Range

#### Lucyzzz

I pretty confuse about the domain and range I think is (-infinity, -3) U (-3, +infinity). for the domain and I don't know how to calculate the range. please someone help me

#### Plato

MHF Helper
View attachment 39725 I pretty confuse about the domain and range I think is (-infinity, -3) U (-3, +infinity). for the domain and I don't know how to calculate the range. please someone help me
The domain is $$\displaystyle (-\infty,-3)\cup [3,\infty)$$ now that is different from what you posted is only one symbol. What is it and why?
Hint: $$\displaystyle \circ\text{ as oppose to } \bullet$$
You post the range.

#### Lucyzzz

Ohh, that's why I keep getting wrong the question. Thank you, Plato.

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