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1/3+1/3^2+1/3^3+1/3^4+1/3^5+1/3^6

Răspuns :

Răspuns:

364/729

Explicație pas cu pas:

1/3 + 1/9 + 1/27 + 1/81 + 1/243 + 1/729

aduci la acelasi numitor

40/81 + 1/243 + 1/729

iara aduci la acelasi numitor

121/243 + 1/729=364/729