→ 2019² - 2.2019.2017 + 2017² = (2019 - 2017)²
→ 2023² - 2019² = (2023+2019).(2023-2019)
• (2019 - 2017)² = 2² = 4
• 2023+2019 = 4042 ve 2023-2019 = 4
İşlem: [tex] \frac{4}{4042.4} = \frac{1}{4042} [/tex]
Cevap: A
