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It's going to be 2, 1, 1, 1.

So B inverse is going to be equal to 1 over the determinant of B.

It's the determinant.

What is this thing right here?

It's just a little tedious.

We go back to plus.

But we're ready now to solve the inverse of a.

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So now let's solve for the determinant.

Let's calculate B inverse.

So the inverse of matrix a is equal to 1 over the determinant of a times the adjugate, or adjoint, of matrix a.

So the area of your parallelogram squared is equal to the determinant of the matrix whose column vectors construct that parallelogram.

You have plus, and then you go minus.

Well you cross out row 1, column 3.

This is the determinant of my matrix.

So another way of saying this, this could be 1 over the determinant.

And actually maybe I'll write that down.

learned from Wikipedia, the correct term is the adjugate of matrix a.

But what is this?

But that is a really neat outcome.

Cross out the first row, first column, I want the determinant of this thing right here.

And then I will take the determinant so when I go to this position, I'm in row 1, column 2.

One possibility for how you can evaluate again like this is just to convert it to the other form.

left with this 0, this 1, this 1, and this 1.

He was present at the ceremony.

So 0 times 1 is 0, minus 1 times 1 is minus 1.

Elements with even index numbers contain category paths, odd elements contain corresponding category names.

So this is minus 1 7.

I have this right here.

And what it is, so this element, this top left element, is essentially going to be the determinant.

Or the minor of this matrix.

A great many people attended his funeral.

In future videos, I promise to give you more tuition.

Remember, all I did is, I said, OK, in position 1,1, let me cross out the column and the row 1,1, and take the determinant of what's left.

Right?

But anyway, let's go back to this position 1, 1.

So the inverse of a is equal to 1 over the determinant.

So minus c minus b.

That is the determinant of my matrix A, my original matrix that I started the problem with, which is equal to the determinant of abcd.

Function MDETERM returns the determinant of a given matrix. The matrix must be of type n x n.

If checked, use a custom format string for naming the files in the collection

So we solved for this part.

My dear Aunt, pray write and let me understand how he should have been there.

Well it's just 1.