Question

If x-1, x, x-1 is a geometric sequence, then x=
(a) -1/2
(b) 1/2
(c) 2
(d) 1
(e) -1

Answer 1

c i think. might have someone else check that

Answer 2

just to be shure

Answer 3

how'd u get the answer?

Answer 4

oh wait thats wrong its -1

Answer 5

because x by itself is 1.
so x=-1 +x would =0
then add the last -1
that =-1

Answer 6

geometric sequence means the ratio of any 2 consecutive terms is the same.
so (x-1/x)=(x/x-1) now solve..

Answer 7

i got x = 1/2

Answer 8

yes right

Answer 9

sorry i was wrong

Answer 10

it's ok and thanks to the both of you