Respuesta :

Milliecartier
Substitute the values 15, 18, and 31 into the equation.
A(15)= -26
A(18)= -32
A(31)= -58

Given the sequence

[tex]a_n = 2+(n-1)(-2)=2-2(n-1)=2-2n+2= -2n+4[/tex]

You can compute the k-th term by evaluating the generic term at n=k. So, the 15th, 18th and 31st terms are

[tex]a_{15}=-2(15)+4=-30+4=-26[/tex]

[tex]a_{18}=-2(18)+4=-36+4=-32[/tex]

[tex]a_{31}=-2(31)+4=-62+4=-58[/tex]