How to make BigIP proxy a request of a pool member

you can test this:

curl -k --proxy myproxy:8080

Your backend hostname have to be reach by your proxy (backenhostname dns resolution must work)

If your proxy policy allows you, you can set backend ip:

curl --proxy myproxy:8080 http://1.1.1.1

For information set -k if you use ssl and want to ignore cert value et -v for verbose.

Regards