Question

ex 10 și 11
va rog, dau coroana!!!​

Answer 1

Răspuns:

10.

1/1-1/3=2/1×3=>1/1×3=1/2(1/1-1/3)

1/2(1/1-1/3+1/3-1)5+1/5-1/7+...1/2021-1/2023)=1/2(1-1/2023)

=1/2(2022/2023)=1011/2023=>c)

se reduc-cu+(-1/3+1/3)

11. 4m_____2zile___4ore/zi

2m______x______8ore/zi

1)4×2=2×x. x=4zile

2) verificare 2/4=4/8=1/2(A)=>4zile a)