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En algèbre linéaire, soit B une base de E et deux familles de scalaires non tous nuls (a1,...,an) et (b1,...,bn) telles que pour tout x∈E de coordonnées (x1,...,xn) dans B, on ait : a1x1+...+anxn = 0 soit équivalent à b1x1+...+bnxn=0Que peut-on dire ?
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