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ex 4 si 5 si 6 urgent!!!!!!!!!

Ex 4 Si 5 Si 6 Urgent class=

Răspuns :

3^19 (36^2+3+1):39=3^19*13:3*13=3^18=(3^9)^2

7^x(1+7^2)=2450  7^x*50=2450   7^x=49   7^x=7^2   x=2