in a geometric sequence s1=25, s2=30, and s3=31 what is s5?

Question

anonymous · Answer

to the nearest tenth

akshay_budhkar · Answer

are u sure it is a geometric sequence?

anonymous · Answer

ohit sayys max is calculating partial sums for a particular geometric sequence

akshay_budhkar · Answer

sorry :( ? but i don't get you.. the sequence is not a geometric one

akshay_budhkar · Answer

and i do not see any relation in the three terms to be truthful

anonymous · Answer

me either which is why im asking

akshay_budhkar · Answer

can u post the complete question (including the max stuff? )

anonymous · Answer

okay here is the question: max is calculating partial sums for a particular geometric sequence. he determines that s1=25,s2=30, and s3 =31 what is the value of s5?

akshay_budhkar · Answer

um.. the answer is max is wrong lol :P :P nope the question has to be incorrect hehe

anonymous · Answer

hah thts wht i said?lol

akshay_budhkar · Answer

:D

anonymous · Answer

Those are partial sums, not the terms themselves.  s1=25 tells you the sum of the first term (which is just the first term itself) is 25.
s2 tells you the sum of the first two terms, which is 30, so the second term in the geometric sequence is 5, since 25+5=30.   
This is enough to figure out the actual sequence is:
25, 5, 1,....

as you can see the sum of the first 3 terms is 31.  so the next two terms is:

1/5, 1/25.