Question

Find the sum of the first 8 terms of the sequence.

1, -3, -7, -11, ...

Answer 1

$

1+(-3)+(-7)+(-11)+(-15)+(-19)+(-23)+(-27) = \\

1-3-7-11-15-19-23-27 = \\

-35-19-23-27= \\

-35-19-50=\boxed{-104}

$

Hope this helps.

r3t40