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Bee55
a fost răspuns

calculati :
A= 2019×2016-2016×2013+2013×2010-2010×2007+2007×2004-2004×2001+....+9×6-6+3.​

Răspuns :

A = 2016 (2019-2013) + 2010 (2013-2007) + 2004 (2007-2001) +...+ 6 (9-3)

A = 2016 × 6 + 2010 × 6 + 2004 × 6 +...+ 6 × 6

A = 6 (2016+2010+2004+...+6)

A = 6 × 6 (336+335+334+...+1)

A = 36 × (336 × 337 / 2)

A = 2038176

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