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September 30, 2025, 03:09:40 am

Author Topic: Help with Methods unit 1!  (Read 923 times)  Share 

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nina_rox

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Help with Methods unit 1!
« on: August 29, 2010, 03:31:27 pm »
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hey i'm nina and i'm a year 10 student in melbourne.
I need help with a question in the methods textbook under the chapter "Functions, Relations and Transformations."
The subheading is "Miscellaneous exercises"
Here is the question:
Find two quadratics functions f and g such that f(1)=0 and g(1)=0 and f(0)=10, g(0)=10 and both have a maximum of 18

Hope you can help!

Thanks for your help in advance!  :)

nina_rox

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Re: Help with Methods unit 1!
« Reply #1 on: August 29, 2010, 03:31:57 pm »
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oops i posted on two places...

kamil9876

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Re: Help with Methods unit 1!
« Reply #2 on: August 29, 2010, 07:13:23 pm »
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f(1)=0 means that (x-1) is a factor so you can write f(x) as:



by plugging in you know that

[1]

Now the maximum occurs at the value that is the midpoint of the two roots, hence the maximum occurs at

So you have:
[2]

[1] and [2] can now be solved.
Voltaire: "There is an astonishing imagination even in the science of mathematics ... We repeat, there is far more imagination in the head of Archimedes than in that of Homer."