Is this homework?  Anyway, the attachment has been stripped off.  Here
is how to plot the function.

fun <- function(x, y){
        a <- 4
        b <- x^2
        d <- y^2
        z <- a-b-d
        return(z)
        }
        
a <- fun(seq(-1000,1000,1), seq(-1000,1000,1))
plot(a)

#integration should be easy enough...
help.search("integration")

numerical integrations is also possible and I know how to do this...
But this can't be homework.  Anyway this should get you started.

On Mon, Jan 5, 2009 at 2:33 PM, jolka sukyte <jol...@gmail.com> wrote:
> Hello,
>
> I am a student and I working with R. I want to ask you  how to solve
> this integral which is shown in image attach with this letter. And how
> to draw this function  z = 4 – x2 – y2 , width intervals x = ±1, y =
> ±1. Thank You.
>
>
> Yours sincerely,
> Jolanta
>
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>
>



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