Thanks for posting. Apologies that your system is not performing as expected.
In researching this, it appears that current technology may have surpassed the capabilities of your N5010. Newer computers have more advanced internet cards in them so they can work with the newer routers with 2.4 and 5.0 G technology.
Have you tried a different wifi card or usb wifi dongle? They are pretty inexpensive and available just about everywhere.
Here is some information from the Router's manufacturer that may be helpful:
And information from Dell's knowledge base:
I doubt that adjusting those settings will "force" your system's WiFi to connect to the repeater, and even if it did, there might be other adverse side effects especially when connecting to other WiFi networks. Of course make sure your drivers are up to date, but other than that, you may want to consider a different network solution in general. Normal (non-mesh) WiFi repeaters are pretty terrible, since every repeater cuts the available WiFi bandwidth in half right off the top, and then they're also not very reliable overall. You might want to consider a Powerline/MoCA networking option, or better yet a Mesh WiFi system like Netgear Orbi or Eero. The Mesh WiFi systems look the same as WiFi repeaters but don't work the same way, and they are a bit expensive, but they're often better than Powerline/MoCA and FAR better than "legacy" WiFi repeaters.