So I have a subspace of the form W = {a$e^x$ + b$e^{-x}$} and I need to express the basis {$e^x$+$e^{-x}$, $e^x$-$e^{-2x}$}
How can I express the second argument of the basis taking into account the 2 in the exponent of e?
I know that the first argument would be a vector of the form (1,1) and the second would start (1, -?);