Math 21A Answer Key
1 (32 pts.)
Practice Exam 1
Determine whether or not the following limits exist, and calculate them. If the limit does not exist as a number, state whether or not it can be written as or -.
x-3 (a) limx3 x2 -2x-
1.) Use the precise epsilon/delta denition of limit to prove the following statements. These
are writing exercises like those done in class. You must be clear, concise, and organized.
a.) lirn (3x + 5) z 35
b. l' 1 4