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General Comment for 9A: For the Final Answers, writing dy/dx= or f'(x)= will remind students what they were looking for in the first place.
Midterm 1:
1c) Do we want to plug in -3, or just see that the denominator goes to zero as you approach -3?
1a) Fix the lim_{x\rightarrow 2} in the fraction 5) Foundations: ... relationship between %the% position s(t)... 5) Final Answers in ft. and ft/sec
Midterm 2:
1c) Graph is not inserted
1a) ... noticing that %if% we plug ... 2b) Instead of just saying "Since 0 is between..", saying "Since y=0 is between" to make it clear that it is not the input x-values that matter.
Midterm 3
1c) One of the limits is x\rightarrow 0 instead of x\rightarrow \infty