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March 29, 2024, 06:44:25 pm

Author Topic: !  (Read 2464 times)  Share 

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fredrick

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!
« on: November 08, 2008, 09:51:02 pm »
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let f(x)=sin(x) or wateva. Where x represents the number of days after september the 30th.

The question asks what date is it when f(x)=0.5. Now lets assume x=3.1 (i know its not, but assume).

So would the answer be 4th october or 3rd october?
the solutions have it as 3rd october?? help
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dekoyl

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Re: !
« Reply #1 on: November 08, 2008, 09:56:29 pm »
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Yeah I got confused about this before, too.
This is my interpretation: others who understand this concept more than I, please shed some light.

|_________________________|
Day 0                                    End of day 1.

Thus: x = 0.5 = during day 1.

fredrick

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Re: !
« Reply #2 on: November 08, 2008, 09:58:31 pm »
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yeh so 3.1 is during day 4(ie 4th october). but the answers have 3rd october.
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onlyfknhuman

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Re: !
« Reply #3 on: November 08, 2008, 09:58:56 pm »
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Yeah I got confused about this before, too.
This is my interpretation: others who understand this concept more than I, please shed some light.

|_________________________|
Day 0                                    End of day 1.

Thus: x = 0.5 = during day 1.

no idea on the logic there you pulled lol
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dekoyl

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Re: !
« Reply #4 on: November 08, 2008, 10:04:06 pm »
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no idea on the logic there you pulled lol
Sorry it's my own interpretation :P I'm not sure if it's correct.

danieltennis

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Re: !
« Reply #5 on: November 08, 2008, 10:09:58 pm »
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Is this from TSSM 2008 exam 2?

fredrick

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Re: !
« Reply #6 on: November 08, 2008, 10:14:09 pm »
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bucket

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Re: !
« Reply #7 on: November 08, 2008, 10:25:46 pm »
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3.1 is day 3. It hasn't reached day 4 yet =_=.

You can't round up a day, it can be 3.99999 and it will still be during day 3.


Pretend your birthday is on the the 4th, you won't be a year older until day 4, even if its 3.99999 days you aren't a year older yet. You can't wait till its halfway through day 3 (3.5) and then consider yourself a year older.
« Last Edit: November 08, 2008, 10:27:22 pm by bucket »
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kantozboy

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Re: !
« Reply #8 on: November 08, 2008, 10:32:42 pm »
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Umm as bucket said above 3.1 is still DURING DAY 3

f(0) = beginning of Sep 30th
f(1) = beginning of Oct 1st
f(2) = beginning of Oct 2nd
f(3) = beginning of Oct 3rd

thus anything between if 3 <(or equal) X < 4 its still on the date of October 3rd.
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fredrick

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Re: !
« Reply #9 on: November 08, 2008, 10:34:54 pm »
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the question said after september 30 so i would assume that f(0) is start of october.
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kantozboy

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Re: !
« Reply #10 on: November 08, 2008, 10:37:10 pm »
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well it actually said 'x days after september 30'
so f(0) is 0 days after september 30 which is still september 30
hope that clarifies it for you!
« Last Edit: November 08, 2008, 10:41:42 pm by kantozboy »
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fredrick

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Re: !
« Reply #11 on: November 08, 2008, 10:42:40 pm »
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well it actually said 'x days after september 30'
so f(0) is 0 days after september 30 which is still september 30
hope that clarifies it for you!
yep thanks!
I will be tutoring Specialist/Methods in 2009. PM me if interested!

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