I have an expression like this
$$ f(x)=\pm 2x (6\frac {a^3}6+b-c x^{5-y}) \qquad (1) $$
I have two questions:
- I want to use the function $f(x)$ in the text with its positive sign; should I use the term "function $f(x)$ with upper sign in (1)" or "function $f(x)$ with plus sign in (1)"?
- Is it OK if instead of the point mentioned in the first question, I use
$$ f^{\pm}(x)=\pm 2x (6\frac {a^3}6+b-c x^{5-y}) \qquad (1) $$
and then simply refer to $f^+(x)$ in the text?
Which option is preferred and is more clear to the reader?