Question

HELP! MEDAL!

Which explains why the sequence 64, 4, 1/4, ... is arithmetic or geometric?

a. The sequence is geometric because it decreases by a factor of 1/16.

b. The sequence is arithmetic because it decreases by a factor of 1/16.

c. The sequence is geometric because it decreases by a factor of 4.

d. The sequence is arithmetic because it decreases by a factor of 4.

Answer 1

do you know the definition of arithmetic and geometric ? seq.

Answer 2

Not really, sorry

Answer 3

You required this :-
1) http://www.mathcentre.ac.uk/resources/uploaded/mc-ty-apgp-2009-1.pdf
2) http://www.jagranjosh.com/articles/arithmetic-progression-ap-geometric-gp-and-harmonic-progression-hp-cat-quantitative-aptitude-1337821417-1

Answer 4

hope you like it and understand it very well ! @Figureskater12

Answer 5

Thanks! :)

Answer 6

arithmetic seq. the differences between consecutive terms are the same (common difference)
when you you add or subtract previous by something to get next term
geometric :the ratio of consecutive terms

Answer 7

your welcome :)

Answer 8

read that chapter and then solve your question own !

Answer 9

if you don't understand, then please ask again !

Answer 10

@Anon101 Lol jay plz help

Answer 11

she is my twin sister

Answer 12

i noticed that :P

Answer 13

lol :)

Answer 14

okay so what you didn't get ?? from that links

Answer 15

it was too long and complicated :(

Answer 16

sorry @mayankdevnani :(

Answer 17

Ahh ! its ok

Answer 18

go through YOU TUBE !

Answer 19

you will definitely understand !

Answer 20

Lol! :)

Answer 21

i knew it........
well
arithmetic seq. when you add or subtract previous by some number to get next term (common difference (d))
geometric seq. when you multiply or divide previous term to get next one (ratio : r)
is that make sense ?

Answer 22

yea

Answer 23

to find common difference (d) formula is \[\huge\rm d=a_2 - a_1\]
and to find ratio \[\huge\rm r = \frac{ a_2 }{ a_1 }\]
apply both formulas and let's see what u get :)

Answer 24

Looks more like A to me.

Answer 25

you think so?

Answer 26

yep :)

Answer 27

oh ok i get it now! it is A because it keeps on decreasing

Answer 28

decreasing how ??

Answer 29

both TWINS are typing !

One SIMILARITY ----> Twins
Other Similarity ---> Both are typing simultaneously.

Answer 30

you divide by 16 therefore the answers are decreasing

Answer 31

question for ^figures

Answer 32

lol

Answer 33

Yasssss twins forevaa

Answer 34

like 64, 4, and then 1/4 if you subtract 64 from 1/16, you get 3.93 so you round it to 4. if you get 4 - 1/16 you get 0.18

Answer 35

correct ! @Anon101

Answer 36

you catch it !

Answer 37

well , A.P have COMMON DIFFERENCE
but G.P have COMMON RATIO

Answer 38

im smarter than her lol jkjk

Answer 39

xD

Answer 40

\(\color{blue}{\text{Originally Posted by}}\) @Figureskater12
like 64, 4, and then 1/4 if you subtract 64 from 1/16, you get 3.93 so you round it to 4. if you get 4 - 1/16 you get 0.18
\(\color{blue}{\text{End of Quote}}\)
okay there is a mistake or typo

Answer 41

Jay!

Answer 42

first choice is geometric
so why did you subtract ??

Answer 43

0.18 i dont think its right

Answer 44

you didn't understand :(

Answer 45

Im sorry! :( *cries from embarrassment*

Answer 46

its divided by 16 therefore it is geometric end of discussion XD