Question

Am nevoie de ajutor va roog!!! Dau coroana!!

Answer 1

(1+1/2+1/3+1/6)²-(1+1/2+1/3+1/6)=

facem calculul in paranteza, adica aducem la acelasi numitor 6

(1 + 1/2 + 1/3 + 1/6) = (6 + 3 + 2 + 1)/6 = 2 (calculul unei paranteze)

2² - 2 =

4 - 2 = 2 (adevarat)

(1 + 1/2 + 1/3 + 1/6)² - (1 + 1/2 + 1/3 + 1/6) = 2 (adevarat)

Answer 2

vezi atașament...................