Question

chứng minh 27\(^3\)+9\(^5\)  ⋮ 4

Answer 1

\(27^3+9^5=\left(3^3\right)^3+\left(3^2\right)^5=3^9+3^{10}=3^9\cdot\left(1+3\right)=4\cdot3^9⋮4\)

Answer 2

Ta có: 27³+9⁵=3³.9³+9⁵=9³.(3³+9²)=9³.108=9³.27.4\(⋮4\)

Answer 3

\(27^3+9^5=3^9+3^{10}=3^9\left(1+3\right)=3^9\cdot4⋮4\)

Answer 4

Ta có: 27³+9⁵=3³.9³+9⁵=9³.(3³+9²)=9³.108=9³.4⋮4