Bonjour
petit calcul simple: 1 987 654²- 1 987 650²- 8 x 1 987 650
Merci de detailler le calcul
petit calcul simple: 1 987 654²- 1 987 650²- 8 x 1 987 650
Merci de detailler le calcul
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Bonsoir,
En prenant n = 1 987 650 on obtient alors
(n+4)² - (n)² - 8(n) = n² + 16 + 8n - n² - 8n = 16
Bonne soirée
Verified answer
Bonsoir
petit calcul simple: 1 987 654 ²- 1 987 650²- 8 x 1 987 650
On pose :
n = 1 987 654
n + 6 = 1 987 650
= n² - (n - 4)² - 8 x (n - 4)
= n² - n² + 8n - 16 - 8n + 32
= 16