Problem
2023 AMC 10B Problem 12
When the roots of the polynomial \[P(x) = (x-1)^1(x-2)^2(x-3)^3 \cdots (x-10)^{10}\] are removed from the real number line, what remains is the union of 11 disjoint open intervals. On how many of those intervals is P(x) positive?
\textbf{(A)} 3 \qquad \textbf{(B)} 7 \qquad \textbf{(C)} 6 \qquad \textbf{(D)} 4 \qquad \textbf{(E)} 5
Full credit goes to MAA for authoring these problems. These problems were taken on the AOPS website.
Want to contribute problems and receive full credit? Click here to add your problem!
Please report any issues to us in our Discord server
Go to previous contest problem (SHIFT + Left Arrow) Go to next contest problem (SHIFT + Right Arrow)
Problem feedback
Difficulty
—