Règle de calcul (mental) Flashcards

1
Q

(a + b)²

A

a² + 2ab + b²

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2
Q

(a² - b²)

A

a² - 2ab + b²

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3
Q

(a +b)(a -b)

A

a² - b²

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4
Q

√a * √b

A

√(ab)

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5
Q

√(k²a)

A

k√a

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6
Q

√(a / b)

A

√a / √b

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7
Q

ln(exp(x))

A

x

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8
Q

exp(ln(x))

A

x

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9
Q

si exp(x) = a alors x = ?

A

x = ln(a)

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10
Q

si x = ln(a) alors a = ?

A

a = exp(x)

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11
Q

ln(x) = ln(y) donc :

A

x = y (fonctionne également pour une inégalité stricte)

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12
Q

ln(a * b)

A

ln(a) + ln(b)

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13
Q

ln(1 / b)

A

-ln(b)

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14
Q

ln(a / b)

A

ln(a) - ln(b)

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15
Q

ln(a^n)

A

n * ln(a) (où n appartient à Z)

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16
Q

ln(√a)

A

1/2 * ln(a)

17
Q

x^n * x^m

A

x^(n+m)

18
Q

x^n / x^m

A

x^(n-m)