Is there a way to allow students to enter subscripts in their answers?
For example, for Calc 2 volume problems, I would like my students to enter the formula for area of the ith rectangle using subscripts on x or y.
Ex. Ai = (xi2 - xi)*delta xi.
I suppose this also requires them to enter delta x.
It would seem to me that they should be allowed to enter x_i, but I cannot seem to get the context to recognize this as a legal variable.
Perhaps I could have them enter xi for xi, but then it would be nice to have a way for this to be redefined as x_i for the Preview.
Anyone have suggestions for me?