# Is this powerset right?

## Homework Statement

if A ={a}, B={b,c}, C={d,e,f,g,h,i,j}

Find P(A*B)
and |P(B*C)|

## The Attempt at a Solution

so for the first one I had

[{(a,b)}, {(a,c)}, {(a,b),(a,c)}, ∅]

and secondly 2^14.

is this right I dont know what is meant by the use of this |..| around a power set?

LCKurtz
Homework Helper
Gold Member
What does A*B mean?

What does A*B mean?

Sorry its meant to mean A times B

dont know what the proper sign is ? or do I just use ()

LCKurtz
Homework Helper
Gold Member
Sorry its meant to mean A times B

dont know what the proper sign is ? or do I just use ()

Sets have union and intersection operations. What is the definition of A "times" B?

Sets have union and intersection operations. What is the definition of A "times" B?

Its a Cartesian product

LCKurtz