Most impressive/complex/amazing C-series program?

[Dieter]

(08-10-2018 06:03 PM)Thomas Klemm Wrote:  The HP-11C can solve a linear, symmetric 2×2 system using the built-in linear regression with a single operation:

Code:

L.R.

This should also work for non-symmetric matrices: Just multiply the second equation by a₁₂/a₂₁ so that the matrix becomes symmetric. This does not take more than

RCL 1 a₂₁ ÷ STO×0 STO×3

I haven't tested this yet (can't find my 34C at the moment), maybe someone else wants to try this.

Dieter