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Question-112310

Question Number 112310 by mohammad17 last updated on 07/Sep/20 Answered by bemath last updated on 07/Sep/20 $$\left.\mathrm{Q2}/\mathrm{A}\right)\:\mathrm{5x}+\mathrm{6y}\:=\:\mathrm{5}×\mathrm{5}+\mathrm{6}×\mathrm{2} \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\mathrm{5x}+\mathrm{6y}\:=\:\mathrm{37} \\ $$ Answered by mathmax by…

solve-0-1-lnx-1-x-2-dx-

Question Number 112313 by mathdave last updated on 07/Sep/20 $${solve} \\ $$$$\int_{\mathrm{0}} ^{\mathrm{1}} \frac{\mathrm{ln}{x}}{\:\sqrt{\mathrm{1}+{x}^{\mathrm{2}} }}{dx} \\ $$ Commented by mohammad17 last updated on 07/Sep/20 $${set}:{x}={tan}\left({r}\right)\Rightarrow{dx}={sec}^{\mathrm{2}}…

x-2-3xy-y-2-1-x-3-y-3-7-

Question Number 112287 by weltr last updated on 07/Sep/20 $$\begin{cases}{{x}^{\mathrm{2}} \:+\:\mathrm{3}{xy}\:+\:{y}^{\mathrm{2}} \:=\:−\mathrm{1}}\\{{x}^{\mathrm{3}} \:+\:{y}^{\mathrm{3}} \:=\:\mathrm{7}}\end{cases} \\ $$ Answered by ajfour last updated on 07/Sep/20 $${x}^{\mathrm{2}} +{y}^{\mathrm{2}}…

Solve-in-R-the-system-x-y-z-1-x-1-y-1-z-

Question Number 177763 by lapache last updated on 08/Oct/22 $${Solve}\:{in}\:\mathbb{R}\:{the}\:{system} \\ $$$$\begin{cases}{{x}+{y}={z}}\\{\frac{\mathrm{1}}{{x}}+\frac{\mathrm{1}}{{y}}=\frac{\mathrm{1}}{{z}}}\end{cases} \\ $$ Commented by mr W last updated on 08/Oct/22 $${no}\:{solution}\:{for}\:{x},{y},{z}\in{R}. \\ $$$${x},\:{y}\:{are}\:{roots}\:{of}\:{t}^{\mathrm{2}}…

proporsed-by-m-n-july-1970-evaluate-n-1-H-n-n2-n-solution-recall-that-n-1-H-n-x-n-ln-1-x-x-1-H-n-x-n-n-0-x-H-n-t-n-1-dt-n-1-0-x-H-n-t-n-1-dt-0-x-

Question Number 112217 by mathdave last updated on 06/Sep/20 $${proporsed}\:{by}\:{m}.{n}\:{july}\:\mathrm{1970} \\ $$$${evaluate} \\ $$$$\underset{{n}=\mathrm{1}} {\overset{\infty} {\sum}}\frac{{H}_{{n}} }{{n}\mathrm{2}^{{n}} } \\ $$$${solution}\: \\ $$$${recall}\:{that}\underset{{n}=\mathrm{1}} {\overset{\infty} {\sum}}{H}_{{n}} {x}^{{n}}…