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melisusta
@melisusta
January 2021
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Bonsoir pouvez vous m'aider svp ? Merci d'avance !
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aymanemaysae
Bonsoir ;
a) Pour n = 4 , on a :
A = (12+10)²+18*14-60 = 484+252-60=676=26² .
b) A= (3n+10)²+(4n+2)(4n-2)-60
= 9n²+60n+100+16n²-4-60
= 25n²+60n+36 .
c) Pour n = 4 , on a :
A = 25*4²+60*4+36 = 25*16+240+36 = 400+240+36 = 676 = 26² .
d) A = 25n²+60n+36 = (5n)² + 2*6*(5n) + 6² = (5n+6)² .
e) Pour n = 4 , on a :
A = (5*4+6) = (20+6)² = 26² = 676 .
1 votes
Thanks 1
melisusta
Merci bcp !
aymanemaysae
De rien .
melisusta
Vous etes tres gentille
melisusta
Est ce que vous pouvez m'aider pour un autre exercice svp ?
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Lista de comentários
a) Pour n = 4 , on a :
A = (12+10)²+18*14-60 = 484+252-60=676=26² .
b) A= (3n+10)²+(4n+2)(4n-2)-60
= 9n²+60n+100+16n²-4-60
= 25n²+60n+36 .
c) Pour n = 4 , on a :
A = 25*4²+60*4+36 = 25*16+240+36 = 400+240+36 = 676 = 26² .
d) A = 25n²+60n+36 = (5n)² + 2*6*(5n) + 6² = (5n+6)² .
e) Pour n = 4 , on a :
A = (5*4+6) = (20+6)² = 26² = 676 .