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In the arthmetic sequence -3,2,7,12,...which term is 57?

Sagot :

Answer:

an=a1(n-1)d

34=2(n-1)d

-2+34=(n-1)d

32=(n-1)d

32=(5-1)d

32=(4)d

32/4=4d/4

8=d

arithmetic sequence :2,10,18,26,34