[General] How to write this in math shorthand

[chiphu]

Dear teachers,

Please help me write the following text in math:

X subscript n equals X subscript zero times 2 to the minus n over 12 power

Thank you very much.

 

[Raymott]

Dear teachers,

Please help me write the following text in math:

X subscript n equals X subscript zero times 2 to the minus n over 12 power

Thank you very much.

x0 = xn * 2^(-n/12)

This editor apparently doesn't do subscripts or superscripts. You'll have to imagine the first 0 and n subscripted (moved down). The ^ means "to the power of" in plain text, but you can delete it and superscript everything following it .

 

[chiphu]

x0 = xn * 2^(-n/12)

This editor apparently doesn't do subscripts or superscripts. You'll have to imagine the first 0 and n subscripted (moved down). The ^ means "to the power of" in plain text, but you can delete it and superscript everything following it .

Thanks a lot, sir. I got it.

By the way, here comes another one: X sub n equals a times 2 to the minus n over 12 power plus b

Based on your help, I wrote it on MS Word and does it display as correctly as this?

 

[Munch]

I don't think that is what you want: the "=a" part should not be subscript. Also, use "×" not "*". Only use "*" when you can't use "×" or ".".

So: a.2 or a×2 or even 2a, but try to avoid 2*a.

EDIT:

Actually, without parentheses (these things), we can't be sure exactly how to write your statement but I interpreted it in the same way Raymott did.

 

[chiphu]

I don't think that is what you want: the "=a" part should not be subscript.

Ah, no, it's not what I want and you're right, I took it wrong. As a matter of fact, it tells us to customize the first equation (at post#1) by replacing X subscript zero with a and add b at the end. So, the correct modified equation should be:

Also, use "×" not "*". Only use "*" when you can't use "×" or ".".

So: a.2 or a×2 or even 2a, but try to avoid 2*a.

Thank you for your tip. I corrected it.

EDIT:

Actually, without parentheses (these things), we can't be sure exactly how to write your statement but I interpreted it in the same way Raymott did.

Yes, I'm confused about this, too. According to the given fact (X sub n equals a times 2 to the minus n over 12 power plus b), I don't know if it's compulsory to put parentheses around a x 2^(-n/12). If so then we got: X0 = (a x 2^(-n/12)) + b

I'm totally relying on your comprehension and knowledge. Please!

 

[Raymott]

Yes, I'm confused about this, too. According to the given fact (X sub n equals a times 2 to the minus n over 12 power plus b), I don't know if it's compulsory to put parentheses around a x 2^(-n/12). If so then we got: X0 = (a x 2^(-n/12)) + b

I'm totally relying on your comprehension and knowledge. Please!

I only used parentheses because I had to write it without markups.
X0 = (a x 2^(-n/12)) + b
Firstly, the outer parentheses are unnecessary because the b is added last in any case.
X0 = a x 2^(-n/12) + b
But you do need these, because 2^(-n/12) + b is not 2^(-n/12 + b)
and 2^-n/12 + b is ambiguous.
This is something that would be best discussed with your teacher.

 

[Munch]

x[sub]0[/sub] = x[sub]n[/sub] * 2[sup](-n/12)[/sup]

That's what I tried first, but it doesn't display for me - I just see all the tags. Does it work for you?

EDIT: I guess Tdol deleted his/her post and is trying again.

 

[Tdol]

x0 = xn * 2^(-n/12)

This editor apparently doesn't do subscripts or superscripts. You'll have to imagine the first 0 and n subscripted (moved down). The ^ means "to the power of" in plain text, but you can delete it and superscript everything following it .

I'll see if we can get the superscript/subscript tags added.

 

[Tdol]

That's what I tried first, but it doesn't display for me - I just see all the tags. Does it work for you?

EDIT: I guess Tdol deleted his/her post and is trying again.

No; I was testing. They need to be added; once added they should work fine.

 

[Red5]

This is a test of [sup]Superscript[/sup] and [sub]Subscript[/sub] text.

 

[Red5]

There you go! ;-)

[sup]Superscript[/sup]
[sub]Subscript[/sub]

 

[Tdol]

Thanks- [sub]nice[/sub] [sup]one[/sup]

If you write [sub]subscript[/sub] or [sup]superscript[/sup] you will get [sub]subscript[/sub] and [sup]superscript[/sup] as a result.

 

[chiphu]

Firstly, the outer parentheses are unnecessary because the b is added last in any case.
X0 = a x 2^(-n/12) + b
This is something that would be best discussed with your teacher.

I guess this reply is good enough for me to end the confusion. Thank you so very much again, sir.

Thanks for all your helps. Really appreciated.

 

[Abstract Idea]

Dear teachers,

Please help me write the following text in math:

X subscript n equals X subscript zero times 2 to the minus n over 12 power

Thank you very much.

I've read the replies to your question and the resulting discussion.
But I still cannot understand the point!
What is the reason for your question? I mean, what exactly is the context?

Your original text does not have a unique version in math symbols. There exists more than one math formula corresponding to your text with very different meanings. Even the version with the symbol "=a" in the subscript may be correct.
Also the math symbols you use is a matter of convention. For instance, there are certain computer programs which accept "9**3" as input while others would produce an input error, demanding the expression to be written as "9^3".
Also expressions like "9*3" are very common in computer programs to represent multiplication.

Concluding, you need context not just in English but also mathematical context.

 

[chiphu]

I've read the replies to your question and the resulting discussion.
But I still cannot understand the point!
What is the reason for your question? I mean, what exactly is the context?
...
Concluding, you need context not just in English but also mathematical context.

Oh nevermind. The matter or what you called, context, was dealt pretty good ten days ago, sir. All I wanted was how to write the text, or the "spoken" equation, in math, and I was satisfied enough with the replies.

I'm gonna pay more attention to verbalization for what I need to get help with next time, if I have time to do so. Thank you, anyway.

 

[Munch]

Your original text does not have a unique version in math symbols. There exists more than one math formula corresponding to your text with very different meanings. Even the version with the symbol "=a" in the subscript may be correct.

I agree and I mentioned this up-thread, but in this case there was one most likely interpretation.

Also the math symbols you use is a matter of convention. For instance, there are certain computer programs which accept "9**3" as input while others would produce an input error, demanding the expression to be written as "9^3".
Also expressions like "9*3" are very common in computer programs to represent multiplication.

Yes, computer programs use different characters because of the limitations of keyboards and character sets, but there exist fairly well established conventions for writing mathematical statements. I would not expect to see * for multiplication or ^ for exponentiation in a mathematics text book, for example.