Row/column counter in 'apply' functions

Question

What if one wants to apply a functon i.e. to each row of a matrix, but also wants to use as an argument for this function the number of that row. As an example,

Answer 1

Actually, in the case of a matrix, you don't even need apply. Just:

test^(1/row(test))

does what you want, I think. I think the row() function is the thing you are looking for.