Răspuns:
a)asa este!! asa mi-a dat si mie!!
b) mie mi-a dat 1012/2025
Explicație pas cu pas:
(3x+3-2x-4)/((x+2)(x+1)) * (x+2)/(x(x-1))=
((x-1)//((x+2)(x+1)))* ((x+2)/(x(x-1)))=1/(x(x+1))
e(1)=1/2= 1-1/2
E92) =1/6=1/2-1/3
E93) =1/13=1/3-1/4
E(2023) = 1/(2023*2024)=1/2023-1/2024
E92024) =1/(2024*2025)=1/2024-1/2025
insumand si reducand termenii identici, avem
1/2-1/2025= (2025-1)/4050=2024/4050=1012/2025