Question

De trei ori media aritmetica a nr. 3 la x -1 , 3 la x si 3 la x+1

Answer 1

3×(3ˣ⁻¹ +3ˣ+3ˣ⁺¹)/3=3ˣ⁻¹ +3ˣ+3ˣ⁺¹=3ˣ(3⁻¹ +3⁰+3¹)=3ˣ(1/3 +1+3)=3ˣ(1/3 +4)=
=3ˣ(1+12)/3=3ˣ × 13/3=13×3ˣ⁻¹