Category: Relation and Functions

Question Number 96194 by mathmax by abdo last updated on 30/May/20 $$\mathrm{let}\mathrm{f}\left(\mathrm{x}\right)=\ln \left(\mathrm{cosx}\right)\mathrm{developp}\mathrm{f}\mathrm{at}\mathrm{fourier}\mathrm{serie}$$ Answered by john santu last updated on 30/May/20 $$\mathrm{ln}\left(\mathrm{cos}\:\mathrm{x}\right)\:=\:\mathrm{ln}\:\left(\frac{{e}^{{ix}} +{e}^{−{ix}} }{\mathrm{2}}\right)…

Question Number 30565 by abdo imad last updated on 23/Feb/18 $$letf\left(x\right)=\frac{1}{n!}{(px-{qx}^2)}^{n}findmaxf.$$ Terms of Service Privacy Policy Contact: info@tinkutara.com

Question Number 30560 by abdo imad last updated on 23/Feb/18 $$studytherootsof{f}_n\left(x\right)=\sum _{k=0}^n\frac{x^k}{k!}.$$ Terms of Service Privacy Policy Contact: info@tinkutara.com

Question Number 30551 by abdo imad last updated on 23/Feb/18 $$findS=\sum _{n⩾3}\frac{1}{(n+1)(n-2)2^n}.$$ Terms of Service Privacy Policy Contact: info@tinkutara.com

Question Number 30550 by abdo imad last updated on 23/Feb/18 $$letf\left(z\right)=\sum _{n⩾0}{a}_n{z}^n/a_0=1,a_1=3and\mathrm{\forall }n⩾2$$$$a_n=3a_{n-1}-2a_{n-2}findf\left(z\right)for\mid z\mid <1(z\in C).$$ Terms of…