Question

determinati numarul real x ,stiind ca numerele 2,xsi x+4 sunt intr-o progresie aritmetica

Answer 1

pa=b=a+c/2
2,x.x+4
a=2
b=x
c=x+4
b=a+c/2⇒x=x+x+4/2⇒x=2x+4/2⇒2x=2x+4⇒2x-2x=4⇒4
succes