My guess if that they take the answer from all questions, shuffle them, take 3 out of those and add the right answer somewhere.
It's just that some idiot forgot to remove answers identical to the right answer from the list.
(I'm being mean, it's easy to overlook, especially if it's some latex behind the scene that look the same but are actually not the same text, and it's possibly unlike to come up in testing)
My understanding was you always assume y to be a function of x (or any other variable you are differentiating with respect to) and if it isn't the case then that should be stated. If I'm wrong then I'll have learnt something new.
Imo, the opposite should be true. One should assume some undefined variable is just a constant unless otherwise specified that it is a function.
It is only by convention that one sees y and assumes y=y(x). It is often safe to assume that y=y(x), but i would argue that it is sloppy of the question writer to not explicitly say that y is or is not a function of other variables.
No;
d/dx(*) means take the derivative of * with respect to x
dy/dx means take the derivative of y with respect to x
For example if you have y = 6x^2 + 2x
Then dy/dx = 12x + 2
And d/dx(y) = d/dx(6x^2 +2x) = 12x + 2
Oh you meant by looking at the answers, yeah that's true. I was wondering in general whether we should treat y as a constant or assume it's dependant on x (perhaps in a case where no answers are given).
I've learnt that we would treat y as a constant unless it is specifically stated that it is a function of x, although you could always substitute dy/dx = 0.
Yeah crazy huh? I found a [post](https://www.reddit.com/r/mathmemes/comments/viwte1/_/?utm_medium=android_app&utm_source=share) about that same thing not too long ago)
It's a small world indeed)
So obvious
[удалено]
This was clearly done to counter those who blindly guess C when they don’t know the answer.
[удалено]
Stun seed backwards lolol
Theyre being sarcastic lol
My guess if that they take the answer from all questions, shuffle them, take 3 out of those and add the right answer somewhere. It's just that some idiot forgot to remove answers identical to the right answer from the list. (I'm being mean, it's easy to overlook, especially if it's some latex behind the scene that look the same but are actually not the same text, and it's possibly unlike to come up in testing)
I see this and my brain immediately starts thinking of implicit derivation, it is driving me mad.
I see a illuminati option b an c are same.
You selected the wrong answer , better luck next time
"Help me"
Bad notation.. this should be partial differentiation?
Not really right? Doesn't say anywhere that y is a function of x.
My understanding was you always assume y to be a function of x (or any other variable you are differentiating with respect to) and if it isn't the case then that should be stated. If I'm wrong then I'll have learnt something new.
Imo, the opposite should be true. One should assume some undefined variable is just a constant unless otherwise specified that it is a function. It is only by convention that one sees y and assumes y=y(x). It is often safe to assume that y=y(x), but i would argue that it is sloppy of the question writer to not explicitly say that y is or is not a function of other variables.
The other way around is safer though. If y is a constant, then you just substitute 0 for dy/dx
Ah ok thank you :)
Woujd it not be dy/dx then? Instead of d/dx.
No; d/dx(*) means take the derivative of * with respect to x dy/dx means take the derivative of y with respect to x For example if you have y = 6x^2 + 2x Then dy/dx = 12x + 2 And d/dx(y) = d/dx(6x^2 +2x) = 12x + 2
Yeah but because the question doesn't have dy/dx, you could probably assume y is a constant and is not a function if x.
Oh you meant by looking at the answers, yeah that's true. I was wondering in general whether we should treat y as a constant or assume it's dependant on x (perhaps in a case where no answers are given). I've learnt that we would treat y as a constant unless it is specifically stated that it is a function of x, although you could always substitute dy/dx = 0.
Then wouldn't there be a factor 1/y in front?
The derivative of x^(y) with respect to x is yx^(y-1). The derivative of 4 is obviously 0. Then, you divide by y, hence the result.
My goodness I'm stupid, thanks.
But we all know that y = f(x), lmao
Help me💡
What is the app ?
Its microsoft math solver, it makes some quizes based on your previous questions
Nice, thx
All answers are wrong because none of the contains dy/dx.
The only thing that makes sense to me is if it specifies y is just an arbitrary constant elsewhere not on the screenshot
Don't we have to "assume" it's a variable unless mentioned that it is not?
[удалено]
Bro what? Its literally just normal derivation. Yx^y-1
is no one going to talk about how b and c are both x^{y-1}
Yeah crazy huh? I found a [post](https://www.reddit.com/r/mathmemes/comments/viwte1/_/?utm_medium=android_app&utm_source=share) about that same thing not too long ago) It's a small world indeed)
Complete psychopath using y as a constant