Bonsoir, pourriez-vous m'aider pour cet exercice en maths svp? C'est sur les puissances. Merci d'ava.... Pergunta de ideia deLucymaths

Lucymaths @Lucymaths

December 2020 1 114 Report

Bonsoir, pourriez-vous m'aider pour cet exercice en maths svp? C'est sur les puissances. Merci d'avance.

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ecto220

Réponse :

Bonsoir

Explications étape par étape

A = $7^{3}$ × $7^{2}$ = $7^{3+2}$ = $7^{5}$

B = $\frac{8^{5} }{8^{2} }$ = $8^{5-2}$ = $8^{3}$

C = $5^{4}$ × $5^{-6}$ = $5^{4-6}$ = $5^{-2}$

D = $\frac{10^{3} }{10^{7} }$ = $10^{3-7}$ = $10^{-4}$

E = $\frac{20^{7} }{5^{7} }$ = $\frac{(5X4)^{7} }{5^{7} }$ = $\frac{5^{7}X4^{7} }{5^{7} }$ = $4^{7}$

F = $3^{2}$ × $5^{2}$ = (3×5)² = 15²

G = (9³)² = $9^{3X2}$ = $9^{6}$

H = $7^{4}$ × $7^{2}$ × $7^{-5}$ = $7^{4+2-5}$ = $7^{1}$ = 7

I = $\frac{7^{3}X5^{4} }{7X5^{2} }$ = $7^{3-1}$ × $5^{4-2}$ = 7² × 5² = (7×5)² = 35²

J = $\frac{4^{3} }{4^{-2} }$ = $4^{3-(-2)}$ = $4^{3+2}$ = $4^{5}$

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Lucymaths Merci beaucoup!!!! :)))))

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