(7la puterea4+2×7la puterea5+3×7laputerea6)÷162=

Răspuns :

(7⁴+2 ×7⁵+3×7⁶)=
=
7⁴×(1+2 ×7+3×7²)=
=7⁴×(1+14+147)=
=
7⁴×162   deci divizibil cu 162