Exercises
1. Expand the following expressions as sums of the terms involved:
a. 
b. 
c. 
d. 
2. Express the following in closed-form summation notation:
a. 
b. 
c. 
d. 
3. Given that 
and 
, find:
and , find:
a. 
b. 
c.
d.
4. Are the following valid equalities?
a.
b.
Verbalize each side of each ...
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