00:01
In this problem, we are given that there is a set a, and the elements in the set is given as 6 .10, 14, and so on, till 58.
00:15
And we are required to determine the cardinal number of the set.
00:21
So as we know that, the cardinal number, it represents the total number of the elements in the set.
00:28
So we have to find the total number of elements in this set.
00:32
And looking at the elements, we see that the elements are written here such that this is in ap, that's arithmetic progression, with a as the first term equal to 6, and the common difference here is 4.
00:46
And let's say, n is the cardinal number of the set, and let's use this idea because the nth term is 58, that's the last term.
00:55
So this will be equal to a plus n minus 1 times d...