A sequence of numbers (geometric sequence) is given by the expression: gn=5*(-1/2)^n . If the sequence begins with n = 1, what are the first two terms for which |gn-g(n+1)|<(1/1000)?
a) g10,g11
b) g11,g12
c) g12,g13
d) g13,g14
e) g14,g15
Do they ask such questions full of calculations on GMAT?
Thanks in advance!
a) g10,g11
b) g11,g12
c) g12,g13
d) g13,g14
e) g14,g15
Do they ask such questions full of calculations on GMAT?
Thanks in advance!
Last edited by finance on Thu Jul 21, 2011 2:47 am, edited 2 times in total.
