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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?
Because i upload this picture by that website .
I think for the greatest integer function
To upload your picture, it is sufficient to type [img]http://im28.gulfup.com/2012-04-03/133345882032.jpg[/img]. Originally Posted by emakarov What does [[x]] denote? Also, could you say what you don't understand about this problem?
Edit: Question about [[x]] is answered in the previous post.
I dont know how to use the information in the problem to solve it .
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.
It is bigger than -2 ,so f(.80)=2(.80)+3 ,right ?
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.
Thanks,for your help .
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