Friday

April 18, 2014

April 18, 2014

Posted by **Jon** on Thursday, December 13, 2007 at 2:55pm.

A)15

B)15/2

C)-15

D)1/15

I chose A

5)Find the fifth term of the sequence in which a1=-3,and aN+1=3aN-n

A)-301

B)-99

C)-193

D)-341

I dont know

- math -
**Reiny**, Thursday, December 13, 2007 at 5:15pmJon, for #1 the equation is

300 = a((-3)^4 - 1)/(-3-1)

300 = a(80)/-4

a = -15

since there are only 4 terms, this is easy to check

-15 + 45 + (-135) + 405 = 300

for you #2, I will assume you meant

a_{1}= -3

a_{N+1}= 3_{N}- n

then:

a_{1}= -3

a_{2}= 3a_{1}- 2 = -11

a_{3}= 3a_{2}- 3 = -36

a_{4}= 3a_{3}- 4 = -112

a_{5}= 3a_{4}- 5 = -341 which is choice D

**Related Questions**

math - 1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 A)15 B)15/2...

math(need 2nd opinion) - 1)Find a1 in a geometric series for which Sn=300,r=-3,...

algebra - 1)Find the 20th term of the arithmetic sequence in which a1=3 and d=7 ...

algebra - 1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 a.15 b....

algebra - 1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 a.15 b....

algebra - 1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 a.15 b....

algebra(check) - 1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 a...

math - 1)Find the sixth term of the geometric sequence for which a1=5 and r=3 A)...

math - Hi I need someone to check my answers I'll show whatever work I have but ...

algebra - Could someone check my work; 1. Generate the first five terms in the ...