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March 29, 2024, 03:10:19 am

Author Topic: Maths Methods Exam 1  (Read 7441 times)  Share 

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costargh

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Maths Methods Exam 1
« Reply #15 on: November 07, 2007, 05:36:37 pm »
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Yeh thats the one I'm referring to. I got it wrong on my trial and my friend showed me how to do it. Goshh I need to do more exam 1's!

melanie.dee

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« Reply #16 on: November 07, 2007, 06:00:07 pm »
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effing hell, im geting so much work, i dont think im even gona get over 30 how im going at the moment. im seriously getting worse! fuck i give up lol

costargh

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Maths Methods Exam 1
« Reply #17 on: November 07, 2007, 06:10:49 pm »
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Dw mell! By the marks youve been getting you should do fine!
Just make sure you try and focus on areas that you know are easy enough to get marks but you are having trouble with or just have no clue with

Defiler

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Maths Methods Exam 1
« Reply #18 on: November 07, 2007, 06:14:31 pm »
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for f: [3, infinity) -> R, f(x) = x^2 - 1, find f^(-1)

and state the domain of f^(-1)

there's a good question.

melanie.dee

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« Reply #19 on: November 07, 2007, 06:31:13 pm »
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Quote from: "Defiler"
for f: [3, infinity) -> R, f(x) = x^2 - 1, find f^(-1)

and state the domain of f^(-1)

there's a good question.


er i dont get it. trick question?

inv = root(x + 1) for domain [8, infinity)

costargh

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Maths Methods Exam 1
« Reply #20 on: November 07, 2007, 06:31:16 pm »
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Umm is it...

f^(-1)= Square root of x + 1

dom f^(-1) = [8, infinity) ?

melanie.dee

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« Reply #21 on: November 07, 2007, 06:32:11 pm »
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haha i think we're missing something :( cos it wouldnt be that easy

costargh

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Maths Methods Exam 1
« Reply #22 on: November 07, 2007, 06:32:28 pm »
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HAHA! I feel like im being played the fooL!

Freitag

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« Reply #23 on: November 07, 2007, 06:44:42 pm »
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You're both right.
rediction of Scores:

English: 40 (hopefully) ; Spec: 40, Methods: 40-45, Physics 35, Enhancement: HD. Last year- History 38; I.T 42.

Hopeful ENTER 98. (I need it for my scholarship :()

costargh

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Maths Methods Exam 1
« Reply #24 on: November 07, 2007, 06:46:06 pm »
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=)
2 marks down
=)
38 to go

melanie.dee

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« Reply #25 on: November 07, 2007, 06:48:21 pm »
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oh sweet, i thought you were trying to trick us haha.

Fitness

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« Reply #26 on: November 07, 2007, 08:35:30 pm »
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Quote from: "Defiler"
for f: [3, infinity) -> R, f(x) = x^2 - 1, find f^(-1)

and state the domain of f^(-1)

there's a good question.


you're trying to say inverse of f?

if so it's easy. Let f(x) = y to make it easier. Swap the x's and the y's and solve for y ...

x=y^2 - 1
x+1 = y^2
therefore y = +-sqrt(x+1)

I have found that inverse questions usually come in the form of something like: y=2e^(x+1) - 3
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rox-n-bones

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« Reply #27 on: November 07, 2007, 08:43:36 pm »
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is it me, or does methods look even more harder when its on the computer?? :?

costargh

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Maths Methods Exam 1
« Reply #28 on: November 07, 2007, 09:07:54 pm »
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Nah when you actually type the question you realise what you write.

Fitness

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« Reply #29 on: November 07, 2007, 09:14:06 pm »
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Quote from: "costargh"
Umm is it...

f^(-1)= Square root of x + 1

dom f^(-1) = [8, infinity) ?


Ok so s/he gave you an easy one ... what's the range for that one? Just a little extra to see we can get you one more mark down  :P
In 2006 Fitness played: IT - Processing and Management (32).
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Quote from: enwiabe
Please don't ask for moderator. It will only hurt your chances.

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Hey guys,
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