Difference between revisions of "2021 AMC 10A Problems/Problem 1"
Pi is 3.14 (talk | contribs) (→Video Solution) |
MRENTHUSIASM (talk | contribs) |
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-happykeeper | -happykeeper | ||
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| + | == Solution 2== | ||
| + | <cmath>\begin{align*} | ||
| + | (2^2-2)-(3^2-3)+(4^2-4) &= 2(2-1)-3(3-1)+4(4-1) \\ | ||
| + | &= 2(1)-3(2)+4(3) \\ | ||
| + | &= 2-6+12 \\ | ||
| + | &= \boxed{\textbf{(D) } 8}. | ||
| + | \end{align*}</cmath> | ||
| + | ~MRENTHUSIASM | ||
== Video Solution (Arithmetic Computation) == | == Video Solution (Arithmetic Computation) == | ||
Revision as of 03:10, 12 February 2021
Problem
What is the value of ![\[(2^2-2)-(3^2-3)+(4^2-4)\]](http://latex.artofproblemsolving.com/f/b/f/fbf9a3889b146c23eb653b9dc16255c03a229dfe.png)
Solution
This corresponds to 
-happykeeper
Solution 2
~MRENTHUSIASM
Video Solution (Arithmetic Computation)
~ pi_is_3.14
See Also
| 2021 AMC 10A (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 | ||
The problems on this page are copyrighted by the Mathematical Association of America's American Mathematics Competitions. 
