can you solve this using matlab function?

Answer 1

[Andrei Bobrov]

Use functions syms, solve, vpa, subs from Symbolic Math Toolbox.

Other way use function roots.

Answer 2

[Torsten]

Use MATLAB's "roots" to determine n such that

1/100000*n*(n-1)*(n-2) = 2*3

and

1/95000*n*(n-1)*(n-2) = 2*3

Best wishes

Torsten.