Question

n.
1) Check whether the following sequences are
G.P. If so, write t
i) 2, 6, 18, 54, ...
ii) 1,-5, 25, -125 ...
1 1 1
,
' '
iv) 3, 4, 5, 6, ..​

Answer 1

Answer:

formula for tn is

tn=ar(n-1) ...... (here (n-1) is index or exponent of 'r')

i) 2,6,18,54...is an GP

tn =2×3 (n-1)

ii) 1,-5, 25,-125....is an GP

tn =1×(-5) (n-1)