Question

rezolvati in multimea numerelor naturale inecuatia:
3la puterea x+1 mai mic sau egal cu 81 , va multumesc

Answer 1

$3^{x+1} \leq 81 <=> 3^{x+1} \leq 3^{4} => x+1 \leq 4 => x \leq 3 =>$ x∈{0,1,2,3}
Solutie:0,1,2,3.