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Calculati folosind factorul comun:
(^inseamna la puterea)
a)3^6+3^5-11×3^4=
b)3^n+3×4^n+3^n+1×4^n+2-3^n+2×4^n+1=


Răspuns :

A. 3^6-3^5-11x3^4 ; 729+243-11x 81; 729+243-891; 81