If you are an external learner:
If those seem familiar, you are studying the same content as in the Alcalde PDF.
18;write_to_target_document7;default0;a1;0;a1;18;write_to_target_document1b;_JlTtaYTOM9iUwbkP_r2G6Qo_100;a50;0;5e9; 0;11c5;0;258d; Electrónica general (Electricidad y Electrónica) - Amazon
: Detailed guidance on solving series, parallel, and mixed circuits, as well as complex multi-loop circuits (mallas) and alternating current (C.A.).
The term "electronica" likely refers to electronics or electronic music. If you're interested in general information about electronics: