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VCE Stuff => VCE Mathematics => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Mathematical Methods CAS => Topic started by: henry14 on March 26, 2012, 07:02:12 pm

Title: double absoute functon
Post by: henry14 on March 26, 2012, 07:02:12 pm

l2+xl-1 =< 3-l2x+3l

- find the domain.


I'm stuck with this questio. :/

Title: Re: double absoute functon
Post by: Peanuts11 on March 26, 2012, 07:14:16 pm

Quote from: henry14 on March 26, 2012, 07:02:12 pm

l2+xl-1 =< 3-l2x+3l

- find the domain.


I'm stuck with this questio. :/

Sketch both functions and look at the graph to solve.You'll have to find a of intersection, look at the graph where to use
(2+x) or -(2+x) and (2x-3) or -(2x-3)

Title: Re: double absoute functon
Post by: henry14 on March 26, 2012, 07:25:07 pm

how do you find it algebraically?

Title: Re: double absoute functon
Post by: TrueTears on March 26, 2012, 07:29:57 pm

expand the modulus into a hybrid, splitting it into cases

Title: Re: double absoute functon
Post by: #1procrastinator on March 29, 2012, 04:58:24 am

i'm interested in this too...bloody absolute values, still can't get my head around it >.>

Title: Re: double absoute functon
Post by: fred42 on March 29, 2012, 12:22:35 pm

See attached.

I doubt this would ever be in a non-calculator exam.