Question

21)aratati ca nr a=3 la puterea 30+3 la 32 +3 la 34/13

Answer 1

[tex]a=3^{30}+3^{32}+3^{34}\\ a=3^{30}(1+3^2+3^4)\\ a=3^{30}(1+9+81)\\ a=3^{30}\cdot 91\\ a=7\cdot13 \cdot3^{30}\ \vdots\ 13 [/tex]