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Math/English related question (no it's not a counter-topic)

category: general [glöplog]
How do you spell y'(t) and ± ?
added on the 2008-05-06 15:04:53 by xernobyl xernobyl
1) derivative of y (probably to t)
2) plus or minus (i hope)
added on the 2008-05-06 15:09:08 by earx earx
spelling is naming the letters that form a word btw
added on the 2008-05-06 15:22:38 by dodke dodke
why prime of tea
1) ok
2) Minus-plus_sign - wikipedia
3) questiomnark
added on the 2008-05-06 15:35:13 by neoneye neoneye
you meant "pronounce"
added on the 2008-05-06 15:38:46 by Gargaj Gargaj
1) derivative of 'y' with respect to 't'
added on the 2008-05-06 15:40:06 by imbusy imbusy
soo... how do you say them in Portuguese?
added on the 2008-05-06 15:58:28 by dnes dnes
Open a 'Math/Portuguese related question (no it's not a counter-topic)' topic for that.
added on the 2008-05-06 16:03:41 by faraday faraday
eles.
y'(t) --- I agree with imbusy. That's exactly how I say it.

± --- plus or minus
added on the 2008-05-06 16:13:21 by bigcheese bigcheese
you don't spell it, that's the beauty of math symbols universality.
added on the 2008-05-06 18:20:25 by Zest Zest
it not suposed to be a derivative... it's like a... similar function, yeah bad notation :P
added on the 2008-05-06 18:42:28 by xernobyl xernobyl
anes (almost) got it right: "y prime t"
the other one is "plus-minus" i think (minus-plus is the other sign)
added on the 2008-05-06 18:49:44 by blala blala
xernobyl':
Oh, in that case, I'd say "y prime at t".
For reference, "f(x)" would be "f at x".. and "f'(x)" would be "f prime at x".
added on the 2008-05-06 19:09:11 by bigcheese bigcheese
I'd say "f of x"
added on the 2008-05-06 19:22:49 by bdk bdk
Laxxy Graxxygaxx:
Saying it that way, it only makes sense when talking about the function when it's not actually being applied. For instance, consider the following-
f(1)
That's "f at 1". "f of 1" doesn't make a lot of sense. Considering f(x) to be "f at x" can make sense in all cases and it forces some interesting understanding of variables and constants.
added on the 2008-05-06 19:53:49 by bigcheese bigcheese
1) y tag
2) plus minus (variable)
added on the 2008-05-06 20:24:33 by LiraNuna LiraNuna
Quote:
f(x) : f x / f of x / the function f of x

math.helsinki.fi
point, I guess :)
added on the 2008-05-06 21:28:45 by bdk bdk
let me add to the "at vs. of" discussion that people actually using this stuff (as opposed to commenting on it here) simply say "f x"... :)
added on the 2008-05-06 21:29:51 by blala blala
2) I heard a Britton saying it: "give or take"
added on the 2008-05-06 21:36:14 by bizun_ bizun_
in danish it would be:

f(x) = f af x
f'(x) = f mærke af x

translate that to english:

f af x = f of x
f mærke af x = f prime of x

.. and that does indeed cover the case where you're not applying the function to x :-)
"f von x" in german, but as always in german you can say it in a long way also (and only then it's 100% correct):
"f an der stelle x"
added on the 2008-05-06 23:01:56 by v3nom v3nom
sorry the correct one has to be:
"der funktionswert von f, an der stelle x"
added on the 2008-05-06 23:02:44 by v3nom v3nom

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