Question

which of the following sequence are in GP (1) 1,-5,25,-125,…..
(2) 120,60,30,18,…
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Answer 1

Answer:

The given first option is in GP

while the 2nd option isn't correct because the value of r is varying.

Step-by-step explanation:

If a=1 r=(-5)/1

r=-5

Hence it satifies the given progression

-5/1=-5

25/-5=-5

-125/25=-5