Question

Aratati ca numarul d=(4^50+4^49+4^48) :21 este patrat perfecf si cub perfect

Answer 1

(4^50+4^49+4^48) :21=

4^48 (4^2+4+1) : 21=

4^48 (16+4+1) :21=

4^48 x 21 :21= 4^48

4^48= (4^24)^2=> este patrat perfect

4^48=(4^16)^3=> cub perfect