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Maryam96
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Maryam96
May 2019 | 1 Respostas
Bonjour, j'ai un devoir en maths et je ne comprend vraiment rien ,quelqu'un pourait-il m'aider svp, merci 1. En utilisant le symbole somme (£) , condensez l’écriture des sommes suivantes : a) n1 x1 + n2 x2 + n3 x3 + … + nk xk b) a x1 + a x2 + a x3 +… + a xn c) x1 + x2 + … + xn – n a d) a x3 + a x4 + … + a xp – b y3 – b y4 - … – b yp 2. Sachant que x1 = 3 , x2 = – 4 , x3 = 5 , x4 = – 1 , x5 = 8 , y1 = 2 , y2 = 6 , y3 = – 2 , y4 = – 6 , y5 = 0 calculez : a) 5 i i = 1 £ x b) 5 j j = 3 £ y c) 5 k k = 1 £ (2 x + 5) d) 5 i i i = 1 £(x + y ) e) 5 i i i = 1 £ x y .
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