HP50g or other: U. of Houston calc exams

[Peter Murphy]

Hi Brad,

Thanks for the tip on composing vectors in polar form; it works fine.

Even with this help, solving 2015 problem 20 on the 50g still takes some thinking, because each leg of the motion is specified with respect to the direction of the previous leg and not in absolute terms.

As to problem 14, somewhere I learned that one can create a polynomial in its symbolic form by specifying all its numerical coefficients, in the form [a b c] for example, and applying the program << 'X' PEVAL EXPAND >>. This is a faster way to create symbolic polynomials of any modest degree than using EQW, for example.

With a longer process using the command DIV2, it's possible to undo this, going from the symbolic form to the array of coefficients. The two programs are handy when a lot of polynomial algebra is involved.

I'm still hoping that one or more members of the Forum will find problems worth discussing.

Peter