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funala
@funala
January 2021
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bonjour, qlq pourrait m'aider svp?
Soient z1,z2 deux nombres complexes non-nuls. Parmi les formules suivantes, lesquelles ne sont pas vraies ?
1 . arg(7z1) equiv arg(z1) (mod 2pi)
2 . arg(i z1) equiv arg(z1) -pi (mod 2pi)
3 . arg(-z1) equiv arg(z1) - pi (mod 2pi)
4 . \rm{Arg} \left( { 1 \over z _1 } \right) equiv -arg(z1) (mod 2pi)
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laurance
1) arg(7z1)=arg(z1)+arg(7)= arg(z1) mod 2pi vrai
2)arg(iz1)=arg(i) +arg(z1)= pi/2 + arg(z1) mod 2pi faux
3)arg(-z1)=arg(-1)+arg(z1)=pi + arg(z1) = -pi +arg(z1) mod 2pi vrai
4)arg(1/z1)= arg(1) - arg(z1)= - arg(z1) mod 2pi vrai
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bonjour j ai un devoir a faire mais je ne comprend pas la consigne... est ce que quelqu'un peut m aider svp? merci d avance
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2)arg(iz1)=arg(i) +arg(z1)= pi/2 + arg(z1) mod 2pi faux
3)arg(-z1)=arg(-1)+arg(z1)=pi + arg(z1) = -pi +arg(z1) mod 2pi vrai
4)arg(1/z1)= arg(1) - arg(z1)= - arg(z1) mod 2pi vrai