January 2021 1 150 Report
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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