Many got the wrong answer‼️ | A Tricky Math Equation!
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- Опубликовано: 9 сен 2024
- Evaluating a mathematical expression using PEMDAS rule.
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x = 2 or -2 (in my world, anyway...)
Here's how I did it.
x = 1. Nope. 1 does not equal 16. (too small)
x = 4. Nope. 256 does not equal 16. (too big)
x = 2. Yes! (perfect)
x squared = 4.
x to the power of 4 = 16. (2x2x2x2)
16 = 16.
I did it differently.
x^x^2 = 16
x^(x^2) = 16
x^(x^2) = 4^2
x^(x^2) = 2^2 * 2^2
x^(x^2) = 2^(2+2)
x^(x^2) = 2^4
x^(x^2) = 2^(2^2)
x = 2. Done.
Actually that's not how I did it.
It was more like this:
x^x^2 = x^(x^2) then "what to the power of itself squared = 16", and then ... 2 just came immediately, because 2^(2^2) = 2^4 = 16.
I.e. it was one of those things where if you were to try and explain how you got your answer, it would be "Uh... I just did?".
Also, I'm assuming a non-native English person using a text-to-speech thing. The clue here is in the "square" instead of "squared", and "is equals to" instead of "is equal to".
X^X^2=16=2^2^2
X=2
I'd like an explanation as to how a negative exponent (i.e. -2) can, in this instance, give the same result as a positive exponent (i.e. +2). In my opinion, x can only be +2. A value of -2 gives a result of 1/16, (I think) which does not conform with the required answer..
2
Let's see, 16 is such a low number. Well, 1 can't be the answer. How about 2? Yeah, 2 works. Problem solved without all the gibberish!!
Kinda how it worked for me😊
2 and -2.
Anyone who got this wrong should quit math immediately and move onto something they are somewhat competent at. This is a very easy grade 9 question not even worth asking.
You do realise that the vast majority of people just don't care what x is?
Do you realise that the vast majority of people don't look at these trivial maths videos?
duhhh