Question

Would this be right @amistre64?

Answer 1

Sorry i have just one more question

Answer 2

So for the next problem it says use words to describe the interval of real numbers: (-4, infinity)

Answer 3

Would it be -4 is less than x less than infinity?

Answer 4

x is a real number such that ... x is _____ then -4

Answer 5

explaining it in words is not the same as stating the interval ... :)

Answer 6

infinity is a direction to move towards, not a value that can be addressed

Answer 7

to say that x is a real number such that x is greater than -4 amount to the same thing as the interval notation defines

Answer 8

to say x is less then infinity means the same thing as saying: x is less them blue

Answer 9

ohh lol that makes sense xD
so it would be x is real number such that x is greater than -4?

Answer 10

yes

Answer 11

ohh ok :)
if the "infinity" was an 8 instead, how would you say it?

Answer 12

...is great than -4, AND x is less then 8

Answer 13

so after that you would put the and?

Answer 14

yep, it is set notation talk ... when we "and" to sets together we are creating a new set of the elements that they have in common.