1.
Find the sum of the first five terms of the geometric series for which
a
1
= 2 and
r
= 2.
A.
14
B.
30
C.
62
D.
126
Hint
2.
Determine the sum of the geometric series for which
a
1
= -486,
, and
a
n
= -6.
A.
-726
B.
732
C.
322.6
D.
325
Hint
3.
Find the sum of the geometric series –5, -10, -20, -40, . . . for 7 terms.
A.
-635
B.
-527
C.
-599
D.
-689
Hint
4.
Identify
a
1
in a geometric series for which
S
8
= 42.5 and
r
= -0.5.
A.
B.
64
C.
1.5
D.
63.75
Hint
5.
Evaluate
.
A.
15
B.
7.5
C.
10.5
D.
6
Hint