Category: Operation Research

Question Number 108406 by pticantor last updated on 16/Aug/20 $$$$$$$$$$\mathit{s}\mathit{o}\mathit{l}\mathit{v}\mathit{e}\mathit{t}\mathit{h}\mathit{e}\mathit{d}\mathit{i}\mathit{f}\mathit{f}\mathit{e}\mathit{r}\mathit{e}\mathit{n}\mathit{t}\mathit{i}\mathit{a}\mathit{l}$$$$\mathit{e}\mathit{q}\mathit{u}\mathit{a}\mathit{t}\mathit{i}\mathit{o}\mathit{n}$$$${\mathit{y}}^{{}^{\prime }}-2e^x\mathit{y}=2e^x\sqrt{\mathit{y}}$$ Answered by…

Question Number 107320 by pticantor last updated on 10/Aug/20 $$letx,y,zbeacomplexnumbers$$$$as\mid x\mid =\mid y\mid =\mid z\mid =1$$$$\{\begin{array}{l}x+y+z=1\\ xyz=1\end{array}$$$$calcul\frac{1}{x}+\frac{1}{y}+\frac{1}{z}=?$$$$x=?y=?z=?$$$$pleaseineedahelp$$ Commented by bemath…

Question Number 106860 by Dwaipayan Shikari last updated on 07/Aug/20 $$1-1+\frac{5}{9}-\frac{7}{27}+\frac{9}{81}-\frac{11}{243}+\dots ..$$ Commented by Dwaipayan Shikari last updated on 07/Aug/20 $$1-\frac{3}{3}+\frac{5}{9}-\frac{7}{27}+\frac{9}{81}-\frac{11}{243}+..$$$${S}=\mathrm{1}−\mathrm{3}{x}+\mathrm{5}{x}^{\mathrm{2}} −\mathrm{7}{x}^{\mathrm{3}}…

Question Number 104132 by bemath last updated on 19/Jul/20 $$whatisthesolution$$$$D^{4}y=12xbythevariation$$$$ofparameters$$ Terms of Service Privacy Policy Contact: info@tinkutara.com

Question Number 103008 by bobhans last updated on 12/Jul/20 $$\frac{dy}{dx}-y.\tan x=e^x.\sec x$$ Answered by bemath last updated on 12/Jul/20 $$IFu\left(x\right)=e^{-\int tanxdx}=e^{\int \frac{d\left(cosx\right)}{cosx}}=$$$$\mathrm{cos}\:{x}.\:\Leftrightarrow\mathrm{cos}\:{x}\:\frac{{dy}}{{dx}}\:−{y}.\mathrm{sin}\:{x}\:=\:{e}^{{x}}…