Răspuns:
Explicație pas cu pas:
c)3^20-3^18=3^18(3²-1)=3^18·2³=(2·3^6)³
d)5^23+2·5^21=5^21(5²+2)=5^21·27=(5³)^7·3³=(3·5^7)³
e) 2^5·4²·16^6=2^5·4²·4^12=2^5·4^14=2^(5+2·14)=2^33=(2^11)³
f)5^14-2·5^13-7·5^12=5^12(5²-2·5-7)=5^12(25-17)=(5^4)³·8=(2·5^4)³
