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tumilari69
@tumilari69
January 2021
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aider moi svp dévelloper et réduire ce calcul pour démontrer que c'est toujours égale à 4
(a+1/a)²-(a-1/a)²
PS: le 1/a est une fraction
merci d'avance car c'est une urgence dm
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trudelmichel
Verified answer
(a+1/a)²-(a-1/a)²=[(a+1/a)+(a-1/a)][(a+1/a)-(a-1/a)
(2a)(2/a)= 4a/a=4
2 votes
Thanks 1
tumilari69
merci bc
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Verified answer
(a+1/a)²-(a-1/a)²=[(a+1/a)+(a-1/a)][(a+1/a)-(a-1/a)(2a)(2/a)= 4a/a=4