calcule : (1-1/4)(1-1/9)(1-1/16)(1-1/25).......(1-1/225)
Mathématiques
anwarjalal
Question
calcule :
(1-1/4)(1-1/9)(1-1/16)(1-1/25).......(1-1/225)
(1-1/4)(1-1/9)(1-1/16)(1-1/25).......(1-1/225)
1 Réponse
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1. Réponse supersong
Bonsoir,
1-1/4 = 4/4 - 1/4 = 3/4
1-1/9 = 9/9 - 1/9 = 8/9
1-1/16 = 16/16 - 1/16 = 15/16
1-1/25 = 25/25 - 1/25 = 24/25
1-1/225 = 225/225 - 1/225 = 224/225