# 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??

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