Category: Relation and Functions

Question Number 94756 by AshrafNejem last updated on 20/May/20 $$solution:\mathrm{Q}1)a)n=\frac{ln\left(m/m_0\right)}{ln0.5}=\frac{ln\left(12/75\right)}{ln0.5}=2.64$$$$N={\mathrm{N}}_0{(0.5)}^n=6.02\times {10}^{23}{(0.5)}^{2.64}=9.66\times {10}^{22}$$$$A=\lambda N=1.5\times {10}^{-4}\times 9.66\times {10}^{22}=1.45\times {10}^{19}Bq$$ Commented…

Question Number 29161 by abdo imad last updated on 04/Feb/18 $$letgivef\left(x\right)=\sqrt{x-1+2\sqrt{x-2}}+\sqrt{x-1-2\sqrt{x-2}}$$$$1)simlifyf\left(x\right)$$$$2)solveinside{\mathbb{N}}^{2}theequationf\left(x\right)=y.$$ Commented by abdo imad last updated on…

Question Number 29148 by abdo imad last updated on 04/Feb/18 $$letgivethesequence\left(u_n\right)/u_0=1and{u}_1=2and$$$$\mathrm{\forall }n\in N2u_{n+2}=3u_{n+1}-u_n.letgivethesequence\left(v_n\right)/$$$${v}_{{n}} =\:{u}_{{n}+\mathrm{1}} −{u}_{{n}} \:.…

Question Number 94660 by msup by abdo last updated on 20/May/20 $$u_n=(1+\frac{1}{n^2})(1+\frac{2}{n^2})\dots (1+\frac{n}{n^2})$$$$find{lim}_{n\to +\mathrm{\infty }}{u}_n$$ Terms of Service Privacy…

Question Number 94661 by msup by abdo last updated on 20/May/20 $$calculate\mathrm{\Sigma }{a}_n{x}^{n}if{a}_{n}verify$$$$a_{n+1}=a_n+a_{n-1}$$ Terms of Service Privacy…