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Quelqun92
@Quelqun92
April 2019
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A) démonter que pourtout nombre entier n différent de 0 :
1/n -1/n+1= 1/n(n+1)
b) A = 1/1*2 +1/2*3 +1/3*4 +.....+1/99*100
quelle est la valeur de A
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Bonjour, je te laisse vérifier le a)
b)
A = 1/1*2 +1/2*3 +1/3*4 +.....+1/99*100
A=1/1-1/2+1/2-1/3+.........+1/99-1/100= 1-1/100= 99/100
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b) A = 1/1*2 +1/2*3 +1/3*4 +.....+1/99*100
A=1/1-1/2+1/2-1/3+.........+1/99-1/100= 1-1/100= 99/100