00:01
Hello students, welcome back.
00:03
Here we are given two sets, set a and set b.
00:08
And we are given the difference between the number of elements of the power set.
00:14
Okay, so what is power set? power set is the set of all the subsets of n set.
00:21
So power set of a will be the set of all the subsets of a.
00:26
Okay, so what will be the number of elements in power set of a? that is the total number of subsets of a, which is equal to 2 to the power m, okay, because a contains m element and b contains an element.
00:39
Okay.
00:40
So number of elements, number of elements in power set of a will be equal to 2 to the power m.
00:50
Okay.
00:51
And similarly for b, it will be equal to 2 to the power n.
00:54
And we are given the difference between these values, okay? so the difference between the number of elements in the power set of a, minus the power set of b is given to be equal to 96.
01:07
Okay, so if i take 2 to the power n common out, then i'm left with 2 to the power m minus n minus 1 is equal to 96...