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upsidedown question mark

what does an upsidedown question mark mean in algebra

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Jun 18, 2011
Upside-down Question Mark
by: Staff

The question:

what does an upside-down question mark mean in algebra

The answer:

I am not aware that the upside-down question mark ¿ is used for any type of algebraic symbol.

It is used in Spanish to ask a question.

Thanks for writing.


Oct 10, 2014
My Practice PSAT uses a upside down question in problems NEW
by: Anonymous

This is a question from my practice PSAT
Let x ¿ y be defined as x^2 + y/2 for all x and y. If 3 ¿ 4 = 5 ¿ n, what is the value of n?
I have NO clue what the heck this means.

Dec 31, 2014
upside down question mark NEW
by: Anonymous

Question from SSAT.
For all real numbers d and y, d upside down QM y = (dXy) - (d+y).
(2 upside down QM 4) X (3 upside down QM 6) =
Answer: (9 upside down QM 3) + 3
I was able to figure out the others but I don't know how they got the answer for this one. If you could let me know, that would be great.

Feb 07, 2017
Upside down question mark in calculus NEW
by: Anonymous

What does an upside down question mark mean in calculus? It is used in MIT OCW calculus.

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