What is the 10th term of the geometric sequence –1, 3, –9, …?

Question

anonymous · Answer

common ratio is -3 right?

anonymous · Answer

its -27

anonymous · Answer

using the fromula. .|dw:1331167077400:dw|

plug the values to the formula..

r= -3
n=10
a1=-1
an=?

anonymous · Answer

no, common ratio is -3. . that represent r.

anonymous · Answer

19683 is the 10th term. .

anonymous · Answer

i think i'm right

kingj · Answer

These are your choices
–59,049 

 –6,561 

 2,187 

 19,683

anonymous · Answer

common ratio is found by dividing the 1st term by the second term or by dividing the third term by the second term. .

the result is -3, not -27

anonymous · Answer

-1   Term 1
3        Term 2
-9               3
27             4
 -81                5
243           Term 6
-729                7
2187               8
-6561               9
19683                10
-59049             11


oh srry u were right

anonymous · Answer

it's ok., no one is perfect! :-)

anonymous · Answer

haha thanks! =)