Mathegoras

Sequences and series › Finite sums › Alternating sums

Alternating sum of a linear sequence

High school · ●●○○○ 20 pts

The nnth term of a sequence is an=(−1)n+1(3n+2)a_n = (-1)^{n+1}(3n + 2). What is the value of a1+a2+⋯+a100a_1 + a_2 + \dots + a_{100}?

Sign in to save your progress.

alternating seriespairingarithmetic sequencessums of sequences