Logarithme néperien Flashcards

1
Q

Df de ln

A

ln est définie sur ]0;+∞[

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2
Q

ln(1)

A

= ln(e^0) = 0

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3
Q

ln (e^x)

A

x

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4
Q

e^ln(x)

A

x

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5
Q

ln(x * y)

A

ln (x) + ln (y)

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6
Q

ln(x) + ln(y)

A

ln (xy)

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7
Q

Ln fait quoi en calculs ?

A

Sépare les grands en petits

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8
Q

Ln (1/x)

A

-ln(x)

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9
Q

ln(x)+ln(y)

A

ln(x*y)

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10
Q

-ln(x)

A

Ln (1/x)

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11
Q

ln(x/y)

A

ln(x)-ln(y)

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12
Q

ln(x)-ln(y)

A

ln(x/y)

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13
Q

ln(√x)

A

1/2ln(x)

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14
Q

1/2ln(x)

A

ln(√x)

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15
Q

ln(x^n)

A

n*ln(x)

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16
Q

n*ln(x)

17
Q

Variations de Ln

A

Strictement croissante sur Df

18
Q

ln (x) = ln (y)

19
Q

ln(x)< ln(y)

20
Q

lim x→+∞(ln x) =

21
Q

lim x→0+(ln x) =