Difference between revisions of "2022 AMC 10B Problems/Problem 1"
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\textbf{(E)}\ 2</math> | \textbf{(E)}\ 2</math> | ||
| − | == Solution == | + | == Solution 1 == |
We have <cmath>\begin{align*} | We have <cmath>\begin{align*} | ||
(1\diamond(2\diamond3))-((1\diamond2)\diamond3) &= |1-|2-3|| - ||1-2|-3| \\ | (1\diamond(2\diamond3))-((1\diamond2)\diamond3) &= |1-|2-3|| - ||1-2|-3| \\ | ||
&= |1-1| - |1-3| \\ | &= |1-1| - |1-3| \\ | ||
&= 0-2 \\ | &= 0-2 \\ | ||
| − | &=\boxed{\textbf{(A)}\ {-}2}. | + | &= \boxed{\textbf{(A)}\ {-}2}. |
\end{align*}</cmath> | \end{align*}</cmath> | ||
~MRENTHUSIASM | ~MRENTHUSIASM | ||
| − | ==Video Solution | + | == Solution 2 == |
| + | Observe that the <math>\diamond</math> function is simply the positive difference between two numbers. Thus, we evaluate: the difference between <math>2</math> and <math>3</math> is <math>1;</math> the difference between <math>1</math> and <math>1</math> is <math>0;</math> the difference between <math>1</math> and <math>2</math> is <math>1;</math> the difference between <math>1</math> and <math>3</math> is <math>2;</math> and finally, <math>0-2=\boxed{\textbf{(A)}\ {-}2}.</math> | ||
| + | |||
| + | ~Technodoggo | ||
| + | |||
| + | ==Video Solution (⚡️Solved in 50 seconds⚡️)== | ||
https://youtu.be/4xOeX0aQF3U | https://youtu.be/4xOeX0aQF3U | ||
~Education, the Study of Everything | ~Education, the Study of Everything | ||
| + | |||
| + | ==Video Solution(1-16)== | ||
| + | https://youtu.be/SCwQ9jUfr0g | ||
| + | |||
| + | ~~Hayabusa1 | ||
| + | ==Video Solution by Interstigation== | ||
| + | https://youtu.be/_KNR0JV5rdI | ||
== See Also == | == See Also == | ||
Latest revision as of 03:22, 23 October 2023
- The following problem is from both the 2022 AMC 10B #1 and 2022 AMC 12B #1, so both problems redirect to this page.
Contents
Problem
Define 
to be 
for all real numbers 
and 
What is the value of ![\[(1\diamond(2\diamond3))-((1\diamond2)\diamond3)?\]](http://latex.artofproblemsolving.com/3/0/a/30abfad2fabbf18f3fae4d47e45fdcc4bf8a8d94.png)
Solution 1
We have 
~MRENTHUSIASM
Solution 2
Observe that the 
function is simply the positive difference between two numbers. Thus, we evaluate: the difference between 
and 
is 
the difference between 
and is 
the difference between and is the difference between and is 
and finally, 
~Technodoggo
Video Solution (⚡️Solved in 50 seconds⚡️)
~Education, the Study of Everything
Video Solution(1-16)
~~Hayabusa1
Video Solution by Interstigation
See Also
| 2022 AMC 10B (Problems • Answer Key • Resources) | ||
| Preceded by First Problem |
Followed by Problem 2 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | ||
| All AMC 10 Problems and Solutions | ||
| 2022 AMC 12B (Problems • Answer Key • Resources) | |
| Preceded by First Problem |
Followed by Problem 2 |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | |
| All AMC 12 Problems and Solutions | |
These problems are copyrighted © by the Mathematical Association of America, as part of the American Mathematics Competitions. 
