If you are a student: Struggle first, then verify. If you are an instructor: Consider making partial solutions available to guide your students without enabling shortcuts.
Note: Chegg and similar services often contain errors. Cross-check with a peer.
Beware of fake or incomplete solution manuals circulating online. Many files labeled "Sze 3rd Edition Solutions" are actually for the or contain only 30% of the problems. A genuine PDF has these characteristics:
p-n junctions, metal-semiconductor contacts, and MIS capacitors.
Understanding how to move from Maxwell’s equations to practical device characteristics.