Question

ajutatima si pe mn va rog !ex 6

Answer 1

3ⁿ⁺¹≤81
3ⁿ⁺¹≤3⁴ <=>n+1≤4 =>n≤3 =>n={0,1,2,3}

Answer 2

3la p n+1 ≤81
3 la put n+1≤ 3⁴
n+1≤4
n≤4-1
n≤3
n€{0,1,2,3}