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Question Number 183913 Answers: 0 Comments: 0

Question Number 183893 Answers: 0 Comments: 2

Question Number 183886 Answers: 4 Comments: 0

Question Number 183879 Answers: 0 Comments: 0

Question Number 183865 Answers: 1 Comments: 0

Question Number 183864 Answers: 4 Comments: 2

Question Number 183863 Answers: 1 Comments: 0

Question Number 183850 Answers: 0 Comments: 0

𝚺_(n=1) ^∞ (1/(n^3 (((6n)),((3n)) )))

$$\underset{\boldsymbol{\mathrm{n}}=\mathrm{1}} {\overset{\infty} {\boldsymbol{\sum}}}\frac{\mathrm{1}}{\boldsymbol{\mathrm{n}}^{\mathrm{3}} \begin{pmatrix}{\mathrm{6}\boldsymbol{\mathrm{n}}}\\{\mathrm{3}\boldsymbol{\mathrm{n}}}\end{pmatrix}} \\ $$

Question Number 183848 Answers: 2 Comments: 1

Question Number 183847 Answers: 5 Comments: 0

Question Number 183846 Answers: 4 Comments: 0

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Question Number 183843 Answers: 1 Comments: 0

Question Number 183835 Answers: 2 Comments: 0

Resoudre le systeme abc =30 a+b+c =10 ab+bc+ac=31

$${Resoudre}\:{le}\:{systeme} \\ $$$$\:\:\mathrm{abc}\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:=\mathrm{30} \\ $$$$\:\:\:\mathrm{a}+\mathrm{b}+\mathrm{c}\:\:\:\:\:\:\:=\mathrm{10} \\ $$$$\:\:\:\mathrm{ab}+\mathrm{bc}+\mathrm{ac}=\mathrm{31} \\ $$$$ \\ $$

Question Number 183827 Answers: 1 Comments: 0

calcul: S=Σ_(n=2 ) ^(+oo) (n/((n^2 −1)^2 ))

$${calcul}:\:\:{S}=\underset{{n}=\mathrm{2}\:\:} {\overset{+{oo}} {\sum}}\frac{{n}}{\left({n}^{\mathrm{2}} −\mathrm{1}\right)^{\mathrm{2}} } \\ $$

Question Number 183825 Answers: 1 Comments: 0

solve for x by using lambert function 2^x +3x=8

$${solve}\:{for}\:{x}\:{by}\:{using}\:{lambert}\:{function} \\ $$$$\mathrm{2}^{{x}} +\mathrm{3}{x}=\mathrm{8} \\ $$

Question Number 183815 Answers: 1 Comments: 0

Question Number 183814 Answers: 1 Comments: 0

determine eigen values and eigen vectors for each λ . and verify Ax=λx A= [(((√3)/2),(−(1/2))),((1/2),( ((√3)/2))) ]

$${determine}\:{eigen}\:{values}\:{and}\:{eigen}\:{vectors}\:{for} \\ $$$${each}\:\lambda\:.\:{and}\:{verify}\:{Ax}=\lambda{x} \\ $$$${A}=\begin{bmatrix}{\frac{\sqrt{\mathrm{3}}}{\mathrm{2}}}&{−\frac{\mathrm{1}}{\mathrm{2}}}\\{\frac{\mathrm{1}}{\mathrm{2}}}&{\:\:\:\:\:\frac{\sqrt{\mathrm{3}}}{\mathrm{2}}}\end{bmatrix} \\ $$

Question Number 183806 Answers: 1 Comments: 0

∫ ((√(x+(√(x^2 +25))))/x) dx =?

$$\:\:\int\:\frac{\sqrt{{x}+\sqrt{{x}^{\mathrm{2}} +\mathrm{25}}}}{{x}}\:{dx}\:=? \\ $$

Question Number 183803 Answers: 1 Comments: 0

Question Number 183783 Answers: 0 Comments: 0

Question Number 183777 Answers: 2 Comments: 1

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Question Number 183773 Answers: 2 Comments: 0

In a square (ABCD) there is a quarter of a circle ADC (AD = DC), put a point N in the arc AC such that AN = 1 and NC = 2(√2) find BN.

$$\:{In}\:{a}\:{square}\:\left({ABCD}\right)\:{there}\:{is}\:{a}\:{quarter}\:{of} \\ $$$$\:{a}\:{circle}\:{ADC}\:\left({AD}\:=\:{DC}\right),\:{put}\:{a}\:{point}\:{N} \\ $$$$\:{in}\:{the}\:{arc}\:{AC}\:{such}\:{that}\:{AN}\:=\:\mathrm{1}\:{and}\:{NC}\:=\:\mathrm{2}\sqrt{\mathrm{2}} \\ $$$$\:{find}\:{BN}.\: \\ $$$$\: \\ $$

Question Number 183767 Answers: 1 Comments: 0

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