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justinebecu
@justinebecu
June 2021
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Donner sous la forme a^n ...merci de m'aider et expliquer si possible
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bouki83
A) La moitié de 2⁴ c'est 2⁴/2. Or 1/2 = 2⁻¹ (propriété des exposants : pour tout x de R, 1/x = x⁻¹)
Donc 2⁴/2 = 2⁴ x 2⁻¹ = 2⁴⁻¹ = 2³
Si tu n'as pas vu la formule 1/x = x⁻¹, tu peux calculer autrement :
2⁴/2 = 16/2 = 8 et 8 = 2³. Mais je te conseille la première méthode.
b) double de 2⁴ = 2 x 2⁴ = 2⁴⁺¹= 2⁵
c) triple de 3³ = 3 x 3³ = 3¹⁺³ = 3⁴
d) tiers de 3³ = 3³/3 = 3³⁻¹ = 3²
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MathieuM
Verified answer
A) la moitié de 2⁴ = 2⁴/2 =2³
b) le double de 2 ⁴ =2×2⁴ =2^( 1+4) =2⁵
c) le triple de 3³ = 3×3³= 3⁴
d)le tiers de 3³ = 3³/3 = 3³×3^ -1 = 3^ (3-1) =3²
^ signifie puissance
1 votes
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Lista de comentários
Donc 2⁴/2 = 2⁴ x 2⁻¹ = 2⁴⁻¹ = 2³
Si tu n'as pas vu la formule 1/x = x⁻¹, tu peux calculer autrement :
2⁴/2 = 16/2 = 8 et 8 = 2³. Mais je te conseille la première méthode.
b) double de 2⁴ = 2 x 2⁴ = 2⁴⁺¹= 2⁵
c) triple de 3³ = 3 x 3³ = 3¹⁺³ = 3⁴
d) tiers de 3³ = 3³/3 = 3³⁻¹ = 3²
Verified answer
A) la moitié de 2⁴ = 2⁴/2 =2³b) le double de 2 ⁴ =2×2⁴ =2^( 1+4) =2⁵
c) le triple de 3³ = 3×3³= 3⁴
d)le tiers de 3³ = 3³/3 = 3³×3^ -1 = 3^ (3-1) =3²
^ signifie puissance