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G=4×3lan+3×3la2n+2+3la2n+1 este divizibil cu 60

Răspuns :

Răspuns:

G=4×3lan+3×3la2n+2+3la2n+1 =

4×3^n+3×3^2n+2+3^2n+1=

4×3^(3n+5)+3^(2n+1)=

. G=3^2^(n+1)[(4×3^(n+4)+1]

Răspuns:

G=4×3lan+3×3la2n+2+3la2n+1 =

=4×3^n+3×3^2n+2+3^2n+1=

=4×3^(3n+5)+3^(2n+1)=

=G=3^2^(n+1)[(4×3^(n+4)+1]

Cu placere!