algebra
posted by Marissa .
1)Find the sixth term of the geometric sequence for which a1=5 and r=3
a.1215
b.3645
c.9375
d.23
answer=a
2)Write an equation for the nth term of the geometric sequence 12,4,4/3,...
a.an=12(1/3)n1
b.an=12(1/3)n1
c.an=12(1/3)n+1
d.an=12(1/3)n1
answer=d
3)Find four geometric means between 5 and 1215
a.+15,45,+135,405
b.15,45,135,405
c.247,489,731,973
d.+247,489,+731,973
answer=d
4)Find the sum of the geometric series 12864+32_____to 8 terms
a.85
b.255
c.86
d.85/2
answer=a
5)Find 6 on top of sigma notation n=1 on the bottom 5(4)n1 on the right side.
a.6825
b.4095
c.1023
d.5120
answer=b
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