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Descopera regula si completeaza fiecare sir.
a) ... ,... ,... ,1350 ,1700 ,2050 ,... ,... ,...
b)... ,... ,... ,36050 ,44060 ,52070 ,... ,... ,...
c)... ,... ,...52500 ,42000 ,31500 ,... ,... ,...


Răspuns :

Răspuns:

a) +350

b)+8010

c)-10500

Explicație pas cu pas:

a) 300,650,1000,1350,1700,2050,2400,2750,3000

b)

12020,20030,28040,36050,44060,52070,60080,68090,72100

c)84000,73500, 63000,52500,42000,31500,21000, 10500,0