Question

am nevoie va rog euuuuuu​

Answer 1

Răspuns:

Explicație pas cu pas:

6.

1000 + 20 + 7 = 1027

___________

7.

XXXVII

____________

8.

23 : 7 = 3 rest 2

In ultimul rans s-au asezat 2 elevi

______________

9.

250

_____________

10.

I + A = 125

I = 2A + 5

2A + 5 + A = 125

3A = 125 - 5 = 120

A = 120 : 3 = 40 timbre are Ana

I = 2*40 + 5 = 85 timbre are Ina

4(40 - n) = 85 + n

160 - 4n = 85 + n

160 - 85 = 4n + n

75 = 5n

n = 75 : 5 = 15 timbre trebuie sa dea Ana Inei

_____________

11.

a = 2^2n*3^2n+1 - 2^2n*3^2n = 2^2n*3^2n*(3 - 1) = 2^2n+1*3^2n

--------

2a = 2^2n+2*3^2n = (2^n+1*3^n)^2 patrat perfect