Răspuns :
a) 2ⁿ+2ⁿ⁺³=
=2ⁿ+2ⁿ×2³=
=2ⁿ+2ⁿ×8=
=2ⁿ×(1+8)=2ⁿ×9⇒ 9 | (2ⁿ+2ⁿ⁺³)
b) 3ⁿ+3ⁿ⁺¹+3ⁿ⁺²=
=3ⁿ+3ⁿ×3+3ⁿ×3²=
=3ⁿ+3ⁿ×3+3ⁿ×9=
=3ⁿ×(1+3+9)=3ⁿ×13⇒ 13 | (3ⁿ+3ⁿ⁺¹+3ⁿ⁺²)
a) 2ⁿ+2ⁿ⁺³=
=2ⁿ+2ⁿ×2³=
=2ⁿ+2ⁿ×8=
=2ⁿ×(1+8)=2ⁿ×9⇒ 9 | (2ⁿ+2ⁿ⁺³)
b) 3ⁿ+3ⁿ⁺¹+3ⁿ⁺²=
=3ⁿ+3ⁿ×3+3ⁿ×3²=
=3ⁿ+3ⁿ×3+3ⁿ×9=
=3ⁿ×(1+3+9)=3ⁿ×13⇒ 13 | (3ⁿ+3ⁿ⁺¹+3ⁿ⁺²)