In a certain sequence, each term

[hershpuri18885]

In a certain sequence, each term, starting with the 3rd term, is found by multiplying the previous two terms. What is the difference between the 6th and 3rd terms in the sequence?

(1) The 1st term is equal to 8 times the 2nd term.

(2) The 4th term is equal to 1.


The answer is B...

They are asking for a difference...

First Term to Sixth
1..-1..-1...1...-1...1

Diff b/w 6th and 3rd is -1 -(-1)=0
_______________________
1/64...8...1/8...1...1/8....1/8...1/64...

Diff b/w 1/64-1/8=-7/64
------------------------

Hersh

[hershpuri18885]

Hence two is insufficient.... right ??

[RonPurewal]

Diff b/w 1/64-1/8=-7/64
------------------------

Hersh

you're supposed to subtract (6th term - 3rd term), but the term in color here is actually the 7th term.
in other words, your approach is a reasonable way to investigate the problem -- but you have to be more careful about counting to six!

i'm not sure what "b/w" means, though (if that would change anything about what you wrote).

[hershpuri18885]

aaahhhhhh... careless!!!!
by the way, b/w is between....

Thanks Ron...

[jnelson0612]

:-)