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Calculati, folosind factorul comun; a) 3^6+3^5-11×3^4= b) 5^5 +5^4-30×5^3= c) 2^n+2^n+1+2^n+2+2^n+3= d) 2^n+5-2^n+4-2^n+3= dau coroana

Răspuns :

a)3⁴(3²+3-11)=3⁴
b)5³(5²+5-30)=0
c)2ⁿ(1+2+3)=2ⁿx6=2ⁿx2x3=2ⁿ⁺¹x3
d)2ⁿ⁺³(2²-2-1)=2ⁿ⁺³x1=2ⁿ⁺³