Leibniz’s Criterion/Test/Rule - Alternating Series Test (𝑎𝑛)𝑛∊ℕ is a convergent sequence with 𝑙𝑖𝑚𝑛→∞𝑎𝑛=0 and is monotonically decreasing → 𝛴1≤𝑖≤∞(-1)𝑖𝑎𝑖 is a convergent series Leibniz’s Criterion - Proof