Resposta:
[tex]y = \frac{5^{3} + 3 . 1}{(5 - 1)^{2} } \\\\y = \frac{125 + 3}{16} \\\\y = \frac{128}{16} \\\\y = 8[/tex]
y=(5−1)253+3.1y=16125+3y=16128y=8
