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Thread: The MangaHelpers Confessional Thread - Part 2

  1. #76
    MH Senpai 伝説メンバー / Densetsu / Legendary Member M3J's Avatar
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    Re: The MangaHelpers Confessional Thread - Part 2

    In general. I'm either too passive or too nice and need to stop that.

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    Re: The MangaHelpers Confessional Thread - Part 2

    His girth

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    Re: The MangaHelpers Confessional Thread - Part 2

    Saying something like "I need to be more aggressive" is too vague and as you said, 'general'. If you want to improve, it's better if you set more specific goals.

    For example, "I need to be more aggressive with my girth next time I'm at the club."

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    MH's Most High Quality Poster 英雄メンバー / Eiyuu Menbaa / Hero Member earthforge's Avatar
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    Re: The MangaHelpers Confessional Thread - Part 2

    Quote Originally Posted by Naomidee View Post
    I confess that spanning vector sets were confusing me, my text book offer no solution manual, so I paid $15 for a month of Chegg. The solution explanations for linear algebra and diff eqs are complete shit. Total waste of money.
    How so?

    Basically, spanning vector sets are like constructing a new random coordinate system. Forget about x,y,z; you now take v1, v2...vN.
    Avatar © Chelsea Gordon, author of Not Quite Normal.

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    Re: The MangaHelpers Confessional Thread - Part 2

    Quote Originally Posted by Naomidee View Post
    Saying something like "I need to be more aggressive" is too vague and as you said, 'general'. If you want to improve, it's better if you set more specific goals.

    For example, "I need to be more aggressive with my girth next time I'm at the club."
    Stuff like when people are decreasing volume of the TV I'm watching, I should be all "hey, don't decrease plz" or if they're changin channel of the TV I'm watchin I should be all "I R WATCHING THAT, U HEAR ME?!" Stuff like that, yanno?

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    Re: The MangaHelpers Confessional Thread - Part 2

    Quote Originally Posted by earthforge View Post
    How so?

    Basically, spanning vector sets are like constructing a new random coordinate system. Forget about x,y,z; you now take v1, v2...vN.
    Well the concepts aren't that out there, but that doesn't mean I know how to approach the problems. Something like:

    Determine the span of {v1,v2} for the given vectors in R3 and describe it geometrically if v1 = (1,-1,2) and v2 = (2,-1,3).

    The solutions on chegg go from A directly to Z. There are virtually no intermediate steps. And my teacher just flies through the material. He doesn't explain examples fully either. :/ I'm just hoping the exam isn't too involved.

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    MH's Most High Quality Poster 英雄メンバー / Eiyuu Menbaa / Hero Member earthforge's Avatar
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    Re: The MangaHelpers Confessional Thread - Part 2

    Quote Originally Posted by Naomidee View Post
    Well the concepts aren't that out there, but that doesn't mean I know how to approach the problems. Something like:

    Determine the span of {v1,v2} for the given vectors in R3 and describe it geometrically if v1 = (1,-1,2) and v2 = (2,-1,3).
    Basically you have two points defined in R3. What is the set of all possible linear combinations of these two points? We can write them as av1+bv2. Thus all elements in the span have the form:

    (a+2b, -a-b, 2a+3b)

    EDIT: Okay, so you set your new linear combination vector (a+2b, -a-b, 2a+3b) equal to (x, y, z).

    You can now observe that y + z = (2a + 3b) + (-a - b) = a + 2b = x.

    This is the form of your solution. Each y and z value determines x.
    Last edited by earthforge; March 21, 2013 at 12:31 AM.
    Avatar © Chelsea Gordon, author of Not Quite Normal.

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    Re: The MangaHelpers Confessional Thread - Part 2

    The Confessional thread has turned into a Maths field...

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  13. #84
    The True Ninja MH中毒 / MH Chuudoku / MH Addicted jorped's Avatar
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    Re: The MangaHelpers Confessional Thread - Part 2

    Quote Originally Posted by Naomidee View Post
    Well the concepts aren't that out there, but that doesn't mean I know how to approach the problems. Something like:

    Determine the span of {v1,v2} for the given vectors in R3 and describe it geometrically if v1 = (1,-1,2) and v2 = (2,-1,3).

    The solutions on chegg go from A directly to Z. There are virtually no intermediate steps. And my teacher just flies through the material. He doesn't explain examples fully either. :/ I'm just hoping the exam isn't too involved.
    I remember doing this kinda stuff on Algebra on my first year on university. Honestly it doesn't strike me as hard. You just need to check some resolved exercises, and soon you will understand it. Once you start understanding it, you will start doing that super easily.

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    Re: The MangaHelpers Confessional Thread - Part 2

    Quote Originally Posted by earthforge View Post
    Basically you have two points defined in R3. What is the set of all possible linear combinations of these two points? We can write them as av1+bv2. Thus all elements in the span have the form:

    (a+2b, -a-b, 2a+3b)

    EDIT: Okay, so you set your new linear combination vector (a+2b, -a-b, 2a+3b) equal to (x, y, z).

    You can now observe that y + z = (2a + 3b) + (-a - b) = a + 2b = x.

    This is the form of your solution. Each y and z value determines x.
    Ohhh kay. So basically v1 and v2 span R3 in the form of y + z = (2a + 3b) + (-a - b) which is the same as a + 2b = x? Basically, I didn't understand that I just needed to generalize the two vectors over the entire span of the third dimension by picking arbitrary variables (you chose a and b in this case). That seems to make sense now.

    Geometrically speaking, this would be a plane in R3, right?

    Quote Originally Posted by jorped View Post
    I remember doing this kinda stuff on Algebra on my first year on university. Honestly it doesn't strike me as hard. You just need to check some resolved exercises, and soon you will understand it. Once you start understanding it, you will start doing that super easily.
    Saying things like "this shit is easy. I did it in my first year" does not encourage or help me, you ass hole. Unless you're going to actually say something USEFUL like earthforge, then just keep your mouth shut. If the book would have showed examples similar to this or my teacher would have gone over it, I wouldn't be having this problem.

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  16. #86
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    Re: The MangaHelpers Confessional Thread - Part 2

    I had to do that in first year (last year)...

    Now I have to do it again

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    Re: The MangaHelpers Confessional Thread - Part 2

    It's like calculus 2... I survived it, but somehow I know it's going to come back to haunt me....

  18. #88
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    Re: The MangaHelpers Confessional Thread - Part 2

    I guess i was kinda of a jerk. Sorry

    I remember i found that easy, but i needed some practice, not like it was easy for me since the first time i saw it. Anyway, it's been more than 2 years now, so i don't honestly remember much any more, plus being in English doesn't help either.

    Anyway, it kinda sucks that your teacher doesn't explain much, cuz one of the reasons why i ended this class with such a good mark was because my teacher was really good, and showed us examples of pretty much everything. But it can be indeed "hard" if you don't have anything to guide on.
    Anyway, i can't really help much. And i do struggle with situations like this from time to time, where the problems isn't actually the subject, but the lack of help the teachers give us in order to fully understand and be prepared for the exam.

    Sorry if i was kinda stupid. Anyway i would recommend you to try to study with some friends, or ask someone of them that is comfortable with that particularly part to explain to you. Anyway good luck for your exams, i will also need some luck for mine XD

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    MH Senpai 伝説メンバー / Densetsu / Legendary Member M3J's Avatar
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    Re: The MangaHelpers Confessional Thread - Part 2

    STOP THIS MATH TALK PLZ

  20. #90
    ༼ つ ◕_◕ ༽つMOLLY༼ つ ◕_◕ ༽つ 伝説メンバー / Densetsu / Legendary Member xi0's Avatar
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    Re: The MangaHelpers Confessional Thread - Part 2

    I hate math...it's not that I suck at it, I just dun liek et.

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