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2014-11-10T18:23:34+02:00
(K+1) * (k+1) * ( k+1)=
(k² + k + k +1) ( k+1) = K³ + k² + k² + k  +k² + k + k +1 = k³ +3k²+ 3k +1
2 5 2
2014-11-10T18:23:42+02:00
Pai.. inmultesti parentezile de cate ori iti arata puterea. tu ai la puterea 3 .
DECI faci : (k+1)(k+1)(k+1)=
         k²+k+k+1(k+1)=
         k²+2k+k+1=
         k²+3k+1

1 5 1