Analyses Flashcards

1
Q

Signe du trinôme

A

Y <= 0 = signe de A

Y > 0 = signe de A à l’extérieur

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2
Q

Croissances comparées avec Ln

A

ln(1+x)/x EN 0 = 1
ln(x)/x EN +inf = 0
ln(x)*x EN 0 =0

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3
Q

Croissances comparées avec exp

A

e(x)-1/x EN 0 = 1
e(x)/x EN +inf = +inf
e(x)*x EN -inf = 0

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4
Q

Bijection

A

f continue et strictement monotone sur I

Alors f définit une bijection sur l’intervalle J=f(I), image de I par f

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5
Q

Fonction dérivable en un point (x0)

A

f(x)-f(x0) / x-x0 EN x0 = limite finie

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6
Q

Tangente en x0

A

y = f’(x0)(x-x0)+f(x0)

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7
Q

Dérivée d’une bijection réciproque

A

(f-1)’(y) = 1 / f’(f-1(y))

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8
Q

IAF

A

f est dérivable sur I et il existe un réel k tel que, pour tout réel x de I, on a |f’(x)| <= k
Alors pour tout (a,b) appartenant à I^2 :
Formule

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9
Q

Théorème du point fixe

A

Soit une suite (Un) vérifiant Un+1 = f(Un). Si elle converge vers un réel L, et si f est continue en L, alors f(L)=L

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10
Q

Trois séries géo

A

k=0, q^k, 1/1-q
k=1, kq^k-1, 1/(1-q)^2
k=2, k(k-1)q^k-2, 2/(1-q)^3

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11
Q

Série de Riemann

A

1/n^A

Converge si A>1

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12
Q

Série expo

A

X^n / n! = e(X)

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13
Q

Séries télescopiques

A

0 à N-1
(Uk+1 - Uk)
= Un - U0

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14
Q

Primitives

  • x^A
  • 1 / racine de x
A
  • x^A+1 / A+1

- 2 racine de x

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15
Q

Primitives

  • u’u^n
  • u’/u
  • u’/sqrt (u)
  • u’/u^n
A
  • u^n+1/n+1
  • ln(u)
  • 2 sqrt (u)
  • -1/(n-1)u^n-1
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16
Q

IPP

A

/ u’v = uv - / uv’