Homework Help: algebra

Posted by Marissa on Thursday, August 23, 2007 at 11:36pm.

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)n-1
b.an=12(-1/3)n-1
c.an=-12(-1/3)-n+1
d.an=-12(-1/3)n-1
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 128-64+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)n-1 on the right side.
a.6825
b.-4095
c.-1023
d.-5120
answer=b

No one has answered this question yet.

Answer this Question

Related Questions

algebra - 1)Find the sixth term of the geometric sequence for which a1=5 and r=3...
algebra - 1)Find the sixth term of the geometric sequence for which a1=5 and r=3...
algebra(check) - 1)Find the sixth term of the geometric sequence for which a1=5 ...
math - 1)Find the sixth term of the geometric sequence for which a1=5 and r=3 A)...
Pre-Cal - 1) Write the first five temrs of the geometric sequence a1 = 2 r=sqrt3...
Pre-Cal(Please help) - 1) Write the first five temrs of the geometric sequence ...
geometric series - what is the nth term equation for a geometric sequence with ...
Alg 2/trig - I am doing Geometric sequences, but I cannot figure out how to find...
math - the third term of a geometric sequence is t3= -75 and the sixth term is ...
Math ( Can You check my Work?) - 1.an = 3n - 1 2. an = 2(2n - 3) 3.an = 4^n 4.an...

For Further Reading

First Name:
School Subject:
Answer: