How do I express these intervals as a single one in interval notation? (-infinity, -4), (0, 4) and (-4, 0), (4, infinity). Should be two intervals total, one comprising the first two parentheses, the other comprising the other two. Help please.

Question

anonymous · Answer

it is not one interval, so you cannot express it as one
on the other hand you can put it in the right order

anonymous · Answer

it is all real numbers except $-4,0,4$

anonymous · Answer

-4, 0,4........not as one though

anonymous · Answer

so how do I express this in interval notation? I am more than a little lost. The first two parentheses are the values on which a function increases, and the second set, the values on which it decreases. But I dont get interval notation at all, and really need help.

anonymous · Answer

So uhm..

anonymous · Answer

Any assistance with this? how can I express those intervals in interval notation?

anonymous · Answer

you have it in interval notation
put them in the normal order

anonymous · Answer

$$(-\infty, -4)\cup (-4,0)\cup (0,4)\cup (4, \infty)$$

anonymous · Answer

I don't understand what you said. This is for webassign and its not going to take it unless its exactly what it wants. and I don't know what is it that it wants. The intervals should be neg infinity, minus four inclusive, oh. The Union sign may be what it wants. Giving it a shot!