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Question-46430

Question Number 46430 by MrW3 last updated on 26/Oct/18 Commented by MrW3 last updated on 27/Oct/18 $${maybe}\:{we}\:{should}\:{at}\:{first}\:{forget}\:{the} \\ $$$${length}\:{of}\:{the}\:{rope}\:{ring}.\:{the}\:{question} \\ $$$${is}\:{just}\:{if}\:{the}\:{rope}\:{can}\:{rest}\:{in}\:{a}\:{inclined} \\ $$$${position}\:{on}\:{the}\:{surface}\:{of}\:{cone}. \\ $$…

Give-a-proof-for-the-following-a-R-b-c-R-x-C-ax-2-bx-c-a-x-b-b-2-4ac-2a-x-b-b-2-4ac-2a-To-answer-I-should-not-expand-from-the-second-

Question Number 46427 by hassentimol last updated on 26/Oct/18 $$\mathrm{Give}\:\mathrm{a}\:\mathrm{proof}\:\mathrm{for}\:\mathrm{the}\:\mathrm{following}. \\ $$$$ \\ $$$$ \\ $$$$\forall\:{a}\:\in\:\mathbb{R}^{\ast} \:,\:\left({b},{c}\right)\:\in\:\mathbb{R}\:,\:{x}\:\in\:\mathbb{C}\:: \\ $$$$ \\ $$$$ \\ $$$${ax}^{\mathrm{2}} \:+\:{bx}\:+\:{c} \\…

Question-111934

Question Number 111934 by mohammad17 last updated on 05/Sep/20 Answered by Aina Samuel Temidayo last updated on 05/Sep/20 $$\sqrt{\mathrm{x}+\mathrm{5}}+\sqrt{\mathrm{2x}+\mathrm{1}}=\mathrm{4x}−\mathrm{10} \\ $$$$\mathrm{Squaring}\:\mathrm{both}\:\mathrm{sides},\mathrm{we}\:\mathrm{have} \\ $$$$\mathrm{x}+\mathrm{5}+\mathrm{2x}+\mathrm{1}+\mathrm{2}\sqrt{\left(\mathrm{x}+\mathrm{5}\right)\left(\mathrm{2x}+\mathrm{1}\right)}=\mathrm{16x}^{\mathrm{2}} +\mathrm{100}−\mathrm{80x} \\…

prove-that-lim-n-n-k-1-n-1-ln-k-n-ln-n-k-2-n-2-pi-8-ln2-

Question Number 111879 by mathdave last updated on 05/Sep/20 $${prove}\:{that}\: \\ $$$$\underset{{n}\rightarrow\infty} {\mathrm{lim}}{n}\underset{{k}=\mathrm{1}} {\overset{{n}−\mathrm{1}} {\sum}}\frac{\mathrm{ln}\left({k}+{n}\right)−\mathrm{ln}\left({n}\right)}{{k}^{\mathrm{2}} +{n}^{\mathrm{2}} }=\frac{\pi}{\mathrm{8}}\mathrm{ln2} \\ $$ Answered by Dwaipayan Shikari last updated…