...Some mixed questions I need some confirmation on.
Find (a) the directrix, (b) the focus and (c) the roots of the parabola .
I can find the directrix and the focus no problem, but i do not understand what they mean by "roots". Do they mean the roots(positive and negative) of the equation or something else?
"roots" are the solutions to
Write the first three terms of the expansion of .
sign errors ...
What are the last three terms of ?
one sign error