Question about this Radial function Rl(r)

[physicss]

Homework Statement

Helllo, I have to show that ∆(R1(r)Y11(ϑ,ϕ)) = 0. I already solved the Y11 part but what is R1(r) or generally written Rl(r) written out? I only know the radial function Rn,l(r). Thanks in advance

Relevant Equations

∆(R1(r)Y11(ϑ,ϕ)) = 0

Y11
I can´t find Rl(r) written out on the internet.

 

[berkeman]

Are you asking how to take a derivative in spherical coordinates?

https://en.wikipedia.org/wiki/Spherical_coordinate_system

If not, what is the exact problem statement from your assignment?