The series' terms (1, −2, 3, −4, ...) do not approach 0; therefore 1 − 2 + 3 − 4 + ... diverges by the term test.
Kushtet e serisë (1, −2, 3, −4, ...) nuk i qasen numrit 0; megjithatë 1 − 2 + 3 − 4 + ... devijon nga kushtet testues.