All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Just Math
Alternative Math (Posted on 2025-01-16) Difficulty: 3 of 5
In an alternative math world, a + b means the maximum of a and b, while a * b means the sum of a and b. For example, 2 + 3 = 3 and 5 * 5 = 10. However, ab is still used as short for a * b, and a2 means a * a. For example, 52 = 10. In this world, what will the graph of x2 + 2x + 1 look like?

No Solution Yet Submitted by Danish Ahmed Khan    
No Rating

Comments: ( Back to comment list | You must be logged in to post comments.)
Solution solution Comment 1 of 1
I will use the notation alt() and norm() to indicate which version of math the expression within parentheses should be used.

So the equation alt(x^2 + 2x + 1) means
alt(A + B + C) where A,B,C are
A is norm(x+x)
B is norm(x+2)
C is 1

and alt(A + B + C) means norm(max(A,B,C))

max(2x, 2+x, 1)
A=B at x = 2
A=C at x = 1/2
B=C at x = -1

if x > 2:  2x
if 1/2 < x < 2:  x+2
if -1 < x < 1/2: x+2
if x < -1:  1

or the function equals:
2x,   if x >= 2
x+2, if -1 < x < 2
1,     if x <= -1

https://www.desmos.com/calculator/qq6tf2cg1z

  Posted by Larry on 2025-01-16 14:50:42
Please log in:
Login:
Password:
Remember me:
Sign up! | Forgot password


Search:
Search body:
Forums (3)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (5)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2025 by Animus Pactum Consulting. All rights reserved. Privacy Information