I was looking at prices of textbooks on Amazon, and I noticed that while you can get an older edition of the textbook for $30, the newer one often shoots up to the $100-200 range. Do professors usually REQUIRE the newest edition, or would an older one be enough (aiming for B+, preferrably A range grades)?
The books I'm concerned about:
for MATH 20B - Calculus Early Transcendentals W/ Or W/o 2 Cd's, 5 Edition by Stewart (this is what's listed on the ucsd schedule when I click on the little book icon, however, I noticed that there's a 6th edition that just came out. Would professors change this to the 6th edition? Or am I safe to purchase the 5th one since it's listed on ucsd website? The reason I'm looking to buy this right now - rather than waiting for after signing up for classes - is that I want to brush up on the basic calculus skills )
for CHEM 6AH - Principles Of Modern Chemistry, 6 Edition