Complex numbers
Number sequences, part 1.
Number sequences, part 2.
Number sequences, part 3.
Lecture notes
Exercises
I. Faragó, Á. Havasi, I. Mezei, P. Simon: Introductory Course in Analysis
M. Gémes, Z. Szentmiklóssy: Mathematical Analysis - Exercises I
L. Fehér, G. Kós, Á. Tóth: Mathematical Analysis - Problems and Exercises II