Question

chứng minh 199^3 -199 chia hết cho 200

 

Answer 1

\(199^3-199=199.\left(199^2-1\right)=199.\left(199+1\right).\left(199-1\right)=199.200.198⋮200\left(đpcm\right)\)

Answer 2

\(199^3-199=199\left(199^2-1\right)=199\left(199+1\right)\left(199-1\right)=199.200.198⋮200\left(đpcm\right)\)