MATHEMATICS FOR DATA SCIENCE/BIOSTATISTICS TRENTO, A.A. 2019/20
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a m1 x 1 + a m2 x 2 + a m3 x 3 + . . . + a mn x n = b m
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−−−−→ E21
−−−−→ E31
−−−−→ E32
−−−−→ E21
−−−−→ E31
−−−−→ E32
] E12
−−−−→ E21
−−−−→ E31
−−−→ E32
−−−−−→ E12
−−−−−→ D2
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