Difference between revisions of "2020 AIME II Problems/Problem 11"
Topnotchmath (talk | contribs) |
Topnotchmath (talk | contribs) |
||
Line 1: | Line 1: | ||
− | ==Problem== | + | ==Problem== |
− | + | Let <math>P(X) = x^2 - 3x - 7</math>, and let <math>Q(x)</math> and <math>R(x)</math> be two quadratic polynomials also with the coefficient of <math>x^2</math> equal to <math>1</math>. David computes each of the three sums <math>P + Q</math>, <math>P + R</math>, and <math>Q + R</math> and is surprised to find that each pair of these sums has a common root, and these three common roots are distinct. If <math>Q(0) = 2</math>, then <math>R(0) = \fracmn</math>, where <math>m</math> and <math>n</math> are relatively prime positive integers. Find <math>m + n</math>. | |
− | Let <math>P(X) = x^2 - 3x - 7</math>, and let <math>Q(x)</math> and <math>R(x)</math> be two quadratic polynomials also with the coefficient of <math>x^2</math> equal to <math>1</math>. David computes each of the three sums <math>P + Q</math>, <math>P + R</math>, and <math>Q + R</math> and is surprised to find that each pair of these sums has a common root, and these three common roots are distinct. If <math>Q(0) = 2</math>, then <math>R(0) = \fracmn</math>, where <math>m</math> and <math>n</math> are relatively prime positive integers. Find <math>m + n</math>. | + | ==Solution== |
− | + | ==Video Solution== | |
− | ==Solution== | + | https://youtu.be/BQlab3vjjxw ~ CNCM |
− | ==Video Solution== | ||
− | https://youtu.be/BQlab3vjjxw ~ CNCM | ||
==See Also== | ==See Also== |
Revision as of 18:12, 7 June 2020
Contents
Problem
Let , and let and be two quadratic polynomials also with the coefficient of equal to . David computes each of the three sums , , and and is surprised to find that each pair of these sums has a common root, and these three common roots are distinct. If , then $R(0) = \fracmn$ (Error compiling LaTeX. Unknown error_msg), where and are relatively prime positive integers. Find .
Solution
Video Solution
https://youtu.be/BQlab3vjjxw ~ CNCM