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a=(3^21+3^20+3^13)/39

Răspuns :

Răspuns:

13.948.731.927:39= 357.659.793

Răspuns:

a=(3²¹+3²⁰+3¹³)/39

a=(3⁸+3⁷+1)x3¹³:39

a=(6561+2187+1)x3¹³:39

a=8749x3¹³:39

a=(8794x3¹³)/89

a=(673x3¹³)/3

a=673x3¹²

sau =357.679.793