Question

Intr o progresie aritmetică 2,x,x+4,sunt termeni consecutivi
Determinați x

Answer 1

2, x, x+4 - termeni consecutivi intr-o progresie arimetrica =>

=> $x = \frac{2+x+4}{2}=\frac{x+6}{2} => 2x=x+6 => x = 6$