Question

Determine o 5° termo da sequência an=n²-3(-1)^n/n+1

Answer 1

an=n² -3(-1)^n / n+1

a5=5² -3(-1)^5 / 5+1

a5=25 -3(-1) / 6

a5=25 +3 / 6

a5= 28/6 = 14/3 ✓

Answer 2

Oi....

$an=n^2-3(-1)^n/n+1\\\\a5=5^2-3(-1)^5/5+1\\\\a5=25-3(-1)6\\\\a5=25+3/6\\\\a5=28/6:2\\\\a5=14/3$

Espero ter ajudado