How to tell PCIe Bifurcation Capability?

Hi, I'm having a Dell Inspiron 3471 and I'm trying to find out if it supports PCIe Bifurcation before buying an adapter for m.2 NVMe drives.

Google doesn't come back any answer for this model, and i didn't see bifurcation mentioned in datasheets. 

How can i find out such info about a server? Thanks!