Answer: x4
Step-by-step explanation:
For this case we must find

By definition we have to:

We have the following functions:

Now, applying the given definition, we have:

Answer:

You'll have to c<span>ompass tip on A and draw a small ark with pencil approximately in the middle above AB line, now compass tip to point B and cross the ark you made previously.
Do the same on the opposite side without making any change to the compass
Join the lines where crosses of arks on the both side meet and then ,it's done.</span>