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