# Question #81894

##### 1 Answer

#### Answer:

See explanations

#### Explanation:

So you want to express

Well, first of all, let's write

We also note that

So, already, we see that

Now we only need to express

We know that

so

which means that

which means that

We finally have:

We could also absorb the

It is more common to write it as follows:

We have expressed

Q.E.D.