Question

Fie sirul $a_n$ difinit prin formula $a_n$ =2-7n
determinati :a) $a_{15}$ b) $a_{2n+1}$
mie imi trebu rezolvarea .raspunsurile le am la a)-103 b)-5-4n multumesc

Answer 1

a. a₁₅=2-7·15=2-105=-103;
b. a2n-1=2-2n+1=-5-4n;