R help - May 2004 - ONE QUESTION IN R-PROJECT

Hello:

I have a question in Math.
If we want to get X's and Y's solution, X>0 and Y>0
We have two equation :

2*exp(X)+X^2+3*Y=2*exp(1)+4
3*X+4*(Y^2)=7

How I use R-project to  solve above question??

THANKS  YOU !!!!
                                   HLC
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It depends. If I had only this specific set of equations to solve, and 
I wanted an answer in the next few minutes, I might solve the second 
equation to give X in terms of Y , substitute the result in the first, 
then plot the result over a range that seemed plausible.

fun2 <- function(Y){
X <- (7-4*(Y^2))/3
2*exp(X)+X^2+3*Y
}
plot(fun2)
fun2.0 <- 2*exp(1)+4
abline(h=fun2.0)

 From here, one can read the solution from the plot: Y is approximately 1.

If you want more than this, see "?optim", work the examples, etc. If
you
want more than this, check the references given with "?optim".

hope this helps. spencer graves

??? wrote:
>Hello:
>
>I have a question in Math.
>If we want to get X's and Y's solution, X>0 and Y>0
>We have two equation :
>
>2*exp(X)+X^2+3*Y=2*exp(1)+4
>3*X+4*(Y^2)=7
>
>How I use R-project to  solve above question??
>
>THANKS  YOU !!!!
>                                   HLC
>	[[alternative HTML version deleted]]
>
>______________________________________________
>R-help at stat.math.ethz.ch mailing list
>https://www.stat.math.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
>  
>

Hello:

I have already found references "optim" ,
but I do not understand its means !!
So I want to ask next question
I have a question in Math.
If we want to get X's and Y's solution, X>0 and Y>0
We have two equation :

2*exp(X)+X^2+3*Y=2*exp(1)+4
3*exp(X/Y)+3*X*Y+4*Y=3*exp(1)+7

How I use R-project to  solve above question??

THANKS  YOU !!!!
THANK YOU VERY MUCH!!
                                                HLC

	[[alternative HTML version deleted]]