Which describes the series: 3 + 9 + 2.7 + 8.1 + …?
(Points : 1)
arithmetic

geometric

neither arithmetic nor geometric

both arithmetic and geometric
C?

Question

Which describes the series: 3 + 9 + 2.7 + 8.1 + …?
(Points : 1)
       arithmetic

       geometric

       neither arithmetic nor geometric

       both arithmetic and geometric
C?

amorfide · Answer

arithmetic is a sequence that adds the same positive or negative number to each term to get the next term

1,3,5,7,9
since I am adding 2
or
1,-1,-3,-5
since I am adding -2

geometric is when you have a ratio, which you multiply each term by to get the next term 

1,3,9,27,81
since I multiply by 3 each time
or
1,5,25,125
since I multiply by 5

anonymous · Answer

So it is C

amorfide · Answer

I would say so

anonymous · Answer

is this also C?




 Which describes the series: 240 + 144 + 86.4 + 51.84 + …?
(Points : 1)
       arithmetic

       geometric

       neither arithmetic nor geometric

       both arithmetic and geometric

anonymous · Answer

Thats definitly not arthimetic.

anonymous · Answer

But i don't know what geometric is so, i cant help you there. Sorry

anonymous · Answer

hmm okay, ty ^_^

anonymous · Answer

I cant answer your pm because you havnt fanned me lol

rishavraj · Answer

@LeilaJudeh  hey u see the common ratio is 0.6

rishavraj · Answer

so obviously its Geometric sequence......

anonymous · Answer

Oooh okay ty rish ^_^

rishavraj · Answer

no need to thank....I need to compensate previous mistake.....lmao...xD

anonymous · Answer

I SAID ITS FINE xD

rishavraj · Answer

oooo i was just kidding.......nothing serious.....