Difference between revisions of "2021 AMC 10B Problems/Problem 2"
Line 17: | Line 17: | ||
https://youtu.be/Df3AIGD78xM | https://youtu.be/Df3AIGD78xM | ||
− | {{AMC10 box|year=2021|ab=B| | + | {{AMC10 box|year=2021|ab=B|num-b=1|num-a=3}} |
Revision as of 00:36, 12 February 2021
Problem
What is the value of
Solution
Note that the square root of a squared number is the absolute value of the number because the square root function always gives a positive number. We know that is actually negative, thus the absolute value is not
but
.
So the first term equals
and the second term is
.
Summed up you get ~bjc and abhinavg0627
Video Solution
https://youtu.be/HHVdPTLQsLc ~Math Python
Video Solution by OmegaLearn
2021 AMC 10B (Problems • Answer Key • Resources) | ||
Preceded by Problem 1 |
Followed by Problem 3 | |
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 |