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Old 7th June 2012, 09:27 PM   #1 (permalink)
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Inverse functions question :( .

hey .

how to do this question?

g:x---> -l1-x l , all real numbers, x>0.

(the vertical lines are the mod).

the function g has an inverse if its domain is restricted to x>=k. find k and define f^-1(x) corresponding to this domain for g.

already found k=1.

but i dunno how to find g^-1 because of the modulus. should it be a positive or negative after i remove the mod?

please help

thank you! ) .

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Old 7th June 2012, 11:01 PM   #2 (permalink)
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Re: Inverse functions question :( .

g(x) = -l1-xl, x>=1
For x>=1, l1-xl =x-1, thus -l1-xl = 1-x

I believe that you no need my help from here.

Here's a tip, plot the graph in your GC, and try to fit in your equations with the domain.

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Old 19th September 2012, 04:39 PM   #3 (permalink)
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Re: Inverse functions question :( .

please give the ans of this question
|x+9|=y+3-4x , x<1>y
i am in trouble please help me
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