Question

the set P(n) is the set of prime factors n, where n is a positive integer greater than 1 e.g: P(12)={2, 3}
list the elements of:
a)P(60)
b)P(18) ∩ P(15)
c)P(30) U P(48)
d)P(6) ∩ P(9) ∩ P(7)

Answer 1

Are you stuck on a particular one or do you just not know how to start?

Answer 2

CAN U ANSWER D?

Answer 3

Yes, but I'd rather help you to figure out the answer for yourself. The question is just asking you for which numbers are prime factors of 6 AND 9 AND 7, so can you think of any?

Answer 4

nope

Answer 5

there no prime factor of 7

Answer 6

Good, so there is nothing which satisfies this right? So the answer will be the empty set.

Answer 7

got it thanks mate

Answer 8

No worries, do you know the symbol for the empty set?

Answer 9

yep