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Mathematics 14 Online
OpenStudy (lovelyharmonics):

limits

OpenStudy (lovelyharmonics):

Determine whether the sequence converges or diverges. If it converges, give the limit. 108, -18, 3, -1/2, ...

OpenStudy (lovelyharmonics):

@aajugdar

OpenStudy (anonymous):

oh @ikram002p will help you with this ^^ when i see convergence and divergence my head starts to spin

OpenStudy (lovelyharmonics):

XD what

Parth (parthkohli):

Hint: look at the sum of this sequence rather than the sequence itself. Does the sum exist? If it doesn't or does, what do you think that implies?

OpenStudy (goformit100):

Professor Parth ( @ParthKohli ) Can Help you.

OpenStudy (ikram002p):

\(\large a_n=\frac{a_(n-1)(-1)^n}{6}\)

OpenStudy (ikram002p):

so as u can see its sighned geometric series after all :D

OpenStudy (ikram002p):

it well be somthing like this |dw:1402676254724:dw|

OpenStudy (lovelyharmonics):

since your dividing each of them by -6 wouldnt it be /-6? instead of /6?

OpenStudy (ikram002p):

lets think of it in simple way a_0=108 a_1=108/-6 a_2=....

OpenStudy (lovelyharmonics):

-18 c:

OpenStudy (ikram002p):

why do u think its diverge ?

OpenStudy (lovelyharmonics):

because eventually it dies.... and im thinking of the one scene from the movie

OpenStudy (anonymous):

xD

Parth (parthkohli):

Does the sum exist? The sum of an infinite geometric sequence exists when\[|r| < 1\]If an infinite sum exists (converges), what is the last value of the sequence supposed to be?

OpenStudy (ikram002p):

well ur correct it dies at the end hehe (sequence not series )

OpenStudy (lovelyharmonics):

so it is divergent?

OpenStudy (ikram002p):

PK it sequence not series we dnt wanna the some

OpenStudy (ikram002p):

try to think of it like this |dw:1402676813779:dw|

OpenStudy (ikram002p):

where the limit go when n goes to infinity

OpenStudy (ikram002p):

u can rewrite it like this as well \(\lim_{n \rightarrow \infty } \Huge \frac{108}{(-6)^n}\)

OpenStudy (ikram002p):

gor an isea abt it nw ? can u solve this limit ? where is the end of this limit u just said (because eventually it dies.. ) soo what do u have nw ?

OpenStudy (ikram002p):

|dw:1402677128751:dw|

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