outils maths Flashcards

1
Q

taux d’évolution

A

(Vf - Vi) / Vi x100

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2
Q

Valeur finale

A

Valeur initiale x k

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3
Q

Valeur initiale

A

Valeur finale / k

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4
Q

Évolution relative

augmentation

A

k = 1 + taux d’augmentation

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5
Q

Évolution relative

réduction

A

k = 1 - taux de réduction

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6
Q

Échelle

A
  • premier nombre toujours 1
  • second nombre correspond a la réalité
  • échelle plus souvent utilisé sont 1/20 et 1/50
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7
Q

Proportion p

A

p = nA/nE
nA : effectif de A
nE : effectif de E

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8
Q

carré

A

x2=a x = racine carré de a

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9
Q

cube

A

x3 = a x = 3racine carré de a

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