Category: Relation and Functions

Question Number 77754 by abdomathmax last updated on 09/Jan/20 $$U_{n}isasequencewochverify$$$$U_n+U_{n+1}=n^2{(-1)}^n\mathrm{\forall }n⩾0$$$$1)detdrmine{U}_{n}intermofn$$$$\left.\mathrm{2}\right)\:{find}\:{nsture}\:{of}\:{the}\:{serie}\:\Sigma\:\frac{{U}_{{n}} }{{n}^{\mathrm{4}} } \…

Question Number 143261 by Mathspace last updated on 12/Jun/21 $$find{Y}_n={\int }_0^{\mathrm{\infty }}\frac{dx}{(x+1)(x+2)\dots .(x+n)}$$$$(n>1integr)$$ Answered by Olaf_Thorendsen last updated on 12/Jun/21 $$…

Question Number 143256 by Mathspace last updated on 12/Jun/21 $$calculate{\int }_0^1{\int }_x^{2-x}{e}^{-xy}\sqrt{x+y}dydx$$ Terms of Service Privacy Policy Contact: info@tinkutara.com

Question Number 143259 by Mathspace last updated on 12/Jun/21 $$solve{y}^{{}^{″}}-y^{{}^{\prime }}+2=xsin\left(3x\right)$$ Answered by qaz last updated on 12/Jun/21 $$\mathrm{y}_{\mathrm{p}} =\frac{\mathrm{1}}{\mathrm{D}^{\mathrm{2}} −\mathrm{D}}\left[\mathrm{xsin}\:\left(\mathrm{3x}\right)−\mathrm{2}\right] \…

Question Number 143255 by Mathspace last updated on 12/Jun/21 $$find{lim}_{x\to 0}\frac{sin(1-cosx)+1-cos\left(sinx\right)}{x^2}$$ Answered by bramlexs22 last updated on 12/Jun/21 $$\underset{{x}\rightarrow\mathrm{0}} {\mathrm{lim}}\:\frac{\frac{\mathrm{sin}\:\left(\mathrm{1}−\mathrm{cos}\:{x}\right)}{\mathrm{1}−\mathrm{cos}\:{x}}.\left(\mathrm{1}−\mathrm{cos}\:{x}\right)+\mathrm{1}−\mathrm{cos}\:\left(\mathrm{sin}\:{x}\right)}{{x}^{\mathrm{2}} } \…