I'm focusing on a task and planning release it under Apache license.

However, there's another lib designed in LGPL3 and I wish to copy over some functions to my lib. Could it be permitted? If so then do you know the conditions?

In the finish I would like it to be Apache licensed.

There's another lib designed in LGPL3 and I wish to copy over some functions to my lib. Could it be permitted?

Yes.

If so then do you know the conditions?

LGPL-3 is really a copyleft license, which means, should you put code from that library to your library, your library must ship underneath the same LGPL-3 terms as lengthy because it qualifies like a derivative work from it and/or perhaps in the scope the LGPL-3 license defines as usage terms.

This may conflict your want:

In the finish I would like it to be Apache licensed.

Since the Apache (2?) license isn't the LGPL-3 license, and also the LGPL-3 license mandates that the job you create from it (as lengthy while you avoid using it as being library) is licensed under LGPL-3 too, you cannot license it under Apache (2?).

You discover all conditions within the license text of LGPL-3. You discover all conditions from the Apache code within the Apache license. You have to check for both an evaluation of the items the relation to use are.

Please be aware that I am software developer, making this no legal counsel. Copyright and also the concept of the licenses may not apply by doing this inside your jurisdiction for that works under consideration, so for any detailed legal analysis you'll still have to speak to a legal person or team in your account.