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1. The problem statement, all variables and given/known data
http://www.chegg.com/homeworkhelp/questionsandanswers/idealopampfindv0termsvsneedhelpsolvingvpfirstlyunderstandingpartsq8278769
2. Relevant equations
I am having difficulties with this problem. It asks to find vo in terms of vs. For the gain, I got an equation of Vn/10 + (Vnvo)/40 = 0, so vo=5Vn. Since the op amp is ideal, vn=vp. Now for Vp is where i am having trouble. I have an equation of [48/60]vs  [48/60]4V=vp. But i am not sure if this right, I am not getting the correct answer. Help!
3. The attempt at a solution
http://www.chegg.com/homeworkhelp/questionsandanswers/idealopampfindv0termsvsneedhelpsolvingvpfirstlyunderstandingpartsq8278769
2. Relevant equations
I am having difficulties with this problem. It asks to find vo in terms of vs. For the gain, I got an equation of Vn/10 + (Vnvo)/40 = 0, so vo=5Vn. Since the op amp is ideal, vn=vp. Now for Vp is where i am having trouble. I have an equation of [48/60]vs  [48/60]4V=vp. But i am not sure if this right, I am not getting the correct answer. Help!
3. The attempt at a solution
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