Question

cine ma ajuta si pe mine la ex 6 ,7 12 ca rog

Answer 1

6) 18={1,2,3,6,9,18)
75={1,3,5,15,25,75}=>luam divizorul comun=3

Answer 2

6.
18=2×3²
75=3×5²
cmmdc=3
Ana are 3 prieteni

7.
2ⁿ⁺¹×3ⁿ+2ⁿ×3ⁿ⁺²+6×2ⁿ×3ⁿ=
=2ⁿ×3ⁿ×(2+3²+6)=
=2ⁿ×3ⁿ×(8+9)=
=2ⁿ×3ⁿ×17  deci divizibil cu 17

12.
7ˣ+7²ˣ+7ˣ⁺³=19257
7ˣ(1+7ˣ+7³)=7²×393
7ˣ(344+7ˣ)=7²×(344+49)
7ˣ(344+7ˣ)=7²×(344+7²)
x=2