# Algebra 2 problem

• Apr 3rd 2012, 06:13 AM
Mhmh96
Algebra 2 problem
• Apr 3rd 2012, 06:38 AM
emakarov
Re: Algebra 2 problem
Why does the formula image serve as a link to some strange site and why is there another hidden link to the same site?

What does [[x]] denote?
• Apr 3rd 2012, 06:39 AM
Mhmh96
Re: Algebra 2 problem
Because i upload this picture by that website .
• Apr 3rd 2012, 06:40 AM
Mhmh96
Re: Algebra 2 problem
I think for the greatest integer function
• Apr 3rd 2012, 06:43 AM
emakarov
Re: Algebra 2 problem

Quote:

Originally Posted by emakarov
What does [[x]] denote?

• Apr 3rd 2012, 06:46 AM
Mhmh96
Re: Algebra 2 problem
I dont know how to use the information in the problem to solve it .
• Apr 3rd 2012, 06:47 AM
emakarov
Re: Algebra 2 problem
Apply g to 0.85. If the result is less than or equal to -2, apply the first line in the definition of f to the result. Otherwise, apply the second line.
• Apr 3rd 2012, 06:59 AM
Mhmh96
Re: Algebra 2 problem
It is bigger than -2 ,so f(.80)=2(.80)+3 ,right ?
• Apr 3rd 2012, 07:03 AM
emakarov
Re: Algebra 2 problem
The greatest integer not exceeding 0.85 is 0, so g(0.85) = 0. Yes, 0 > -2, so (f ∘ g)(0.85) = f(g(0.85)) = f(0) = 2 * 0 + 3 = 3.
• Apr 3rd 2012, 07:07 AM
Mhmh96
Re: Algebra 2 problem