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    #1

    Unhappy How to write this in math shorthand

    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.

  1. Raymott's Avatar
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    #2

    Re: How to write this in math shorthand

    Quote Originally Posted by chiphu View Post
    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 .

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    #3

    Re: How to write this in math shorthand

    Quote Originally Posted by Raymott View Post
    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?


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    #4

    Re: How to write this in math shorthand

    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 a2 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.

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    #5

    Re: How to write this in math shorthand

    Quote Originally Posted by Munch View Post
    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:



    Quote Originally Posted by Munch View Post
    Also, use "" not "*". Only use "*" when you can't use "" or ".".

    So: a.2 or a2 or even 2a, but try to avoid 2*a.
    Thank you for your tip. I corrected it.

    Quote Originally Posted by Munch View Post
    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!

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    #6

    Re: How to write this in math shorthand

    Quote Originally Posted by chiphu View Post
    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.

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    #7

    Re: How to write this in math shorthand

    Quote Originally Posted by Tdol View Post
    x0 = xn * 2(-n/12)
    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.

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    #8

    Re: How to write this in math shorthand

    Quote Originally Posted by Raymott View Post
    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.

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    #9

    Re: How to write this in math shorthand

    Quote Originally Posted by Munch View Post
    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.

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    #10

    Re: How to write this in math shorthand

    This is a test of Superscript and Subscript text.
    I'm not a teacher, so please consider any advice I give in that context.

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