You left out an awful lot of information. What kind of course did you see this problem in? What do you know about such problems? What ideas do you have about it? Do you have, for example, a "guess" as to what degree this polynomial should be?
You left out an awful lot of information. What kind of course did you see this problem in? What do you know about such problems? What ideas do you have about it? Do you have, for example, a "guess" as to what degree this polynomial should be?