00:01
Okay, so we want to use mathematical induction to show that the following is true.
00:06
So let's work with condition 1.
00:08
We need to show that n is equal to 1 is true.
00:12
So plugging that in, we get 1 squared is equal to 1.
00:15
Is that the same as our right hand side? let's plug in 1.
00:20
And we get a 3 times 2, which is a 6 over 6.
00:25
So that's equal to 1.
00:27
So this is true.
00:28
And now let's go on to condition 2.
00:30
So we want to assume that k plus or n is equal to k is true.
00:37
So let's rewrite that.
00:39
So we have 1 squared all the way up to k squared that should be equal to 1 over 6 times k times k plus 1 times 2k plus 1.
00:51
And now we want to show that n is equal to k plus 1 is true.
00:56
So if it were true, we would have 1 squared plus dot dot dot up to k squared.
01:01
Plus k plus 1 squared, that should be equal to 1 over 6 times a k plus 1.
01:11
I'm just replacing this k with the k plus 1...