Question and Answers Forum

All Questions      Topic List

Arithmetic Questions

Previous in All Question      Next in All Question      

Previous in Arithmetic      Next in Arithmetic      

Question Number 86343 by jagoll last updated on 28/Mar/20

$$\mathrm{Dear}\mathrm{mr}\mathrm{w}.\mathrm{i}\mathrm{want}$$$$\mathrm{discuss}\mathrm{for}\mathrm{equation}$$$$\mathrm{find}\mathrm{minimum}\mathrm{and}\mathrm{maximum}\mathrm{value}$$$$\mathrm{of}\mathrm{xy}+2\mathrm{with}\mathrm{constraint}$$$${\mathrm{x}}^2+{\mathrm{y}}^2=6.$$$$\mathrm{my}\mathrm{way}\left(\mathrm{short}\mathrm{cut}\right)$$$$\Rightarrow {\mathrm{x}}^2={\mathrm{y}}^2=3$$$$\{\begin{array}{l}\max ={\left(\sqrt{3}\right)}^2+2=5\\ \min =-{\left(\sqrt{3}\right)}^2+1=-1\end{array}$$$$\mathrm{it}\mathrm{correct}?$$

Commented by mr W last updated on 28/Mar/20

$$thisiscorrect,becausebothinxy+2$$$$andin{x}^2+y^2=6thereisthesymmetry$$$$forxandy,i.e.xandyareequally$$$$valued.$$

Commented by jagoll last updated on 28/Mar/20

$$\mathrm{thank}\mathrm{you}\mathrm{very}\mathrm{much}\mathrm{mister}$$

Terms of Service

Privacy Policy

Contact: info@tinkutara.com