Question

Determine o valor de x, de modo que os termos (x + 1),
(3x – 2) e (2x + 4), nessa ordem, formem uma PA.
a) 1
b) 3
c) 2
d) 1/2
e) 4
​

Answer 1

$\large\boxed{\begin{array}{l}\sf3x-2=\dfrac{x+1+2x+4}{2}\\\sf 6x-4=3x+5\\\sf 6x-3x=5+4\\\sf 3x=9\\\sf x=\dfrac{9}{3}\\\sf x=3\\\huge\boxed{\boxed{\boxed{\boxed{\sf\maltese~alternativa~b}}}}\end{array}}$