Question

Me ajudem Pfvr com esse dv aqui embaixo?

Answer 1

2,522222...

2,522222... = 2 + 0,5222222222222....

x = 0,522222222...
10x = 5,2222222...
10x = 5 + 0,222222222...

y = 0,22222222222...
10y = 2,222222....
10y = 2 + 0,22222222222....
10y = 2 + y
10 - y = 2
9y = 2
y = 2/9

10x = 5 + 2/9
10x = (45+2)/9
10x = 47/9
x = 47/90

2,522222... = 2 + 47/90
2,522222... = (180 + 47) / 90
2,522222... = 227/90

0,4444444...

x = 0,44444444...
10x = 4,4444444...
10x = 4 + 0,44444444...
10x = 4 + x
10x - x = 4
9x = 4
x = 4/9

0,4444444... 4/9

2,5222.... + 0,4444.... / (1/4)

= 227/90 + 4/9/1/4

= 227/90 + 4*4/9

= 227/90 + 16/9

= (227 + 160) / 90

= 387/90

= 387:9/90:9

= 43/10

= 4,3

LETRA A