Here is why:
Even with a solution manual, students make predictable errors. Here is how the 7th edition specifically addresses them: Fundamentals Of Electric Circuits 7th Edition Solutions
The 7th edition introduces ideal op-amp assumptions (infinite gain, zero current). However, real problems involve saturation. The solutions manual is invaluable here because it shows the exact moment the output voltage clips to the supply rails. Solution Strategy: Look for the step where the solution checks if Vo is less than Vcc. If that step is missing from your attempt, you likely got the problem wrong. Here is why: Even with a solution manual,