# Multivariable limit problem [closed]

Im triying to explain this delta-epsilon problem, but I didnt find a way to attack effectively this rigorous demonstration

I actually i tried a lot of inequalities (Cauchy-Schwarz etc), but nothing came up with this demostration, Im stuck here, its a difficult solution or Im just dump??

## closed as off-topic by Tommi Brander, kcrisman, Mikhail Katz, Benjamin Dickman, Steven GubkinJun 28 '17 at 16:43

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• "This question is off-topic because it is a mathematical question as contrasted with a question about mathematics education. For a Stack Exchange site for mathematical questions please see Mathematics." – Tommi Brander, kcrisman, Mikhail Katz, Benjamin Dickman, Steven Gubkin
If this question can be reworded to fit the rules in the help center, please edit the question.

• I agree that this is better suited to math.stackexchange.com. However, a hint: this expression can be rewritten as $\frac{2(x+3)^3+5(y-4)^3}{\sqrt{(x+3)^2+(y-4)^2}}$. – Steven Gubkin Jun 28 '17 at 13:45
• Agree Steven Im changing to MathSE. thank for your comment – Wilfred V Jun 28 '17 at 16:58