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fifou3852
@fifou3852
April 2022
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Bonjour, aidé moi sur cet exo svp. je vous mets une photo.
Soient les nombres
- A = √7-4√3
- B = √3 - 2
1) Calculer leur carré. Que constate-t-on ?
2) A et B sont-ils égaux ? Si non, compare-les .
Merci beaucoup !
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HananeC
1) A^2 = 7-4√3B^2 =(√3 -2)^2= √3 ^2 -2×2×√3 +2^2B^2 =3-4√3 +4 =7 -4√3Donc A^2=B^22) Non, on a B<0 (car √3<2 ) et A>0Donc B<A
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Thanks 3
fifou3852
merci beaucoup
fifou3852
juste les "^"représente quoi pour vous ?
HananeC
A^2 c'est à dire A puissance 2
fifou3852
merci beaucoup ;)
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