C7 Nb Imaginaires Flashcards

1
Q

opération dans C

z + z’

A

(a + a’) + i(b + b’)

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2
Q

opération dans C

zz’

A

(aa’ - bb’) + i(ab’ + a’b)

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3
Q

opération dans C

z = z’

A

[ a = a’ ⋀ b = b’]

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4
Q

conjugué

⏤(z+z’)

A

⏤z + ⏤z’

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5
Q

conjugué

⏤(z×z’)

A

⏤z × ⏤z’

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6
Q

conjugué

⏤(1/z)

A

1/⏤z

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7
Q

conjugué

⏤(z/z’)

A

⏤z / ⏤z’

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8
Q

conjugué

z + ⏤z

A

2 Re (z)

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9
Q

conjugué

z - ⏤z

A

2 i Im (z)

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10
Q

conjugué

z ∈ ℝ

A

Im (z) = 0

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11
Q

z ∈ iℝ

A

Re (z) = 0

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12
Q

z ∈ ℝ

A

⏤z = z

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13
Q

z ∈ iℝ

A

⏤z = − z

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14
Q

module

⎥⏤z⎪= ⎥z⎪ = ⎥−z⎪

A
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15
Q

module

z×⏤z

A

⎥z⎪²

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16
Q

module

⎥z×z’⎪

A

⎥z⎪×⎥z’⎪

17
Q

module

⎥1/z⎪

18
Q

module

⎥z/z’⎪

A

⎥z⎪/⎥z’⎪

19
Q

module

⎥z⎪ = 0

20
Q

module

⎥z⎪

avec Im et Re

A

⎥z⎪≤ ⎥Re(z)⎪+ ⎥Im(z)⎪

21
Q

module

⎥Re(z)⎪
⎥Im(z)⎪

A

≤⎥z⎪

22
Q

module

⎥zⁿ⎪

A

⎥z⎪ⁿ

récurrence

23
Q

module

Inégalité triangulaire

A

⎥z + z’⎪≤ ⎥z⎪+⎥z’⎪

24
Q

cercle et disque

⎥z - a⎪= r

A

le cercle de centre A et de rayon r

25
# cercle et disque ⎥z - a⎪≤ r
le disque fermé de centre A et de rayon r
26
# cercle et disque ⎥z - a⎪< r
le disque ouvert de centre A et de rayon r
27
# Ensemble 𝕌 forme trigo
z = cos θ + i sin θ
28
# Ensemble 𝕌 Formule d'Euler
cos θ = (e^iθ + e^-iθ) / 2 sin θ = (e^iθ - e^-iθ) / 2i
29
# Ensemble 𝕌 e^iθ × e^iθ'
e^i(θ + θ')
30
# Ensemble 𝕌 e^iθ / e^iθ'
e^i(θ - θ')
31
# Ensemble 𝕌
32
# arguments z = z'
[(⎪z⎥=⎪z'⎥) ⋀ (arg z = arg z' [2π])]
33
# arguments arg (zz')
arg z + arg z' [2π]
34
arg (1/z)
− arg(z) [2π]
35
# arguments arg (z'/z)
arg (z') - arg(z) [2π]
36
# argument arg(⏤z)
− arg (z) [2π]
37
# argument z ∈ℝ*
arg(z) = 0 [π]!!
38
# argument z ∈ i ℝ*
arg (z) = π/2 [π]
39
# argument arg (zⁿ)
n arg z