Answers

2015-07-16T21:04:31+08:00
You can use the formula an=a1 r n-1
find first the ratio..
0
a1=4 r=3 n=?
n= the term you are going to find..
ex..you are going to find 6th term in an replace n with the number 6
all you need to do is replace n into the number of term you're finding
thank you
2015-07-16T21:36:41+08:00
Use sn= [a1(1-r^n)]/ (1-r)
with a1 = 4, r=3, and n=5
you'll get 484
0
so a1=4 n=4 r=3??
a1=4, n=5, r= 3, you should be able to get 484
im sorry, my mistakes
its ok ...
thank you