Matematika A - 2013. ljeto, 7.

A. $3-9+27-81+\dots 3-9+27-81+\backslash ldots$

B. $6+12+24+48+\dots 6+12+24+48+\backslash ldots$

C. $8-12+18-27+\dots 8-12+18-27+\backslash ldots$

D. $125+75+45+27+\dots 125+75+45+27+\backslash ldots$