The sets F and H are defined as follows.
F={vlv≤1}
H={vlv

Question

The sets F and H are defined as follows.
F={vlv≤1}
H={vlv<7}

Write F∪H and F∩H using interval notation.
Please Help??

anonymous · Answer

I don't remember how to do this I guess u r on ur own lol

writerforever18 · Answer

Aww man ok then thanks loll It says there are 4 qualified helpers online...where are they??

dayakar · Answer

do u write the roster form of two sets

writerforever18 · Answer

What do you mean?

pawanyadav · Answer

F U H = (-infinite, 7)

pawanyadav · Answer

F Π H = (-infinite, 1]

writerforever18 · Answer

Oh yeah it involves infinity and negative infinity

writerforever18 · Answer

Pawanyadav: wait are those the answers?

pawanyadav · Answer

Yes...what you think....

writerforever18 · Answer

I'll try it

writerforever18 · Answer

But how did you get it?

pawanyadav · Answer

In Union take every value in domain of F and H

dayakar · Answer

F = { .....,-3,-2,-1,0,1}

H = { ......,  -3,-2,-1,0,1,2,3,4,5,6}

$$F \cup H = { ...., -3,-2,-1,0,1,2,3,4,5,6 } = H$$

dayakar · Answer

is it clear?

writerforever18 · Answer

dayakar: I don't really understand. Is there a clearer way you could explain please?
But anyway the problem is correct. Thank you!

writerforever18 · Answer

Pawnyadav: The answer was right! Do you mind helping me with a couple more please?

dayakar · Answer

writing all elements separating with commas is called roster form of the set

writerforever18 · Answer

Oh ok cool. So could you help me with the next one please?

pawanyadav · Answer

I think dayakar is explaining everything correct...he would help you ...

writerforever18 · Answer

Ok thank you :)

dayakar · Answer

$$F = \left\{ v/v \le 1 \right\}$$  [this is called set builder form]
 means F contains the elements  which  are less or equal to 1

writerforever18 · Answer

Ok
I'm typing the next question as I'm reading your posts...thank you so much for your help! :)