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Mathematics 23 Online
OpenStudy (anonymous):

What are the next three terms of the following sequence? -2,-1,-1/2,-1/4

OpenStudy (welshfella):

Hint to get the next term you multiply by a certain farction

OpenStudy (welshfella):

* fraction

OpenStudy (anonymous):

would the next one be -1/6 or -1/8 somthing like that?

OpenStudy (welshfella):

one of those is correct to find the common ratio r divide the second term by the first

OpenStudy (welshfella):

oops - divide the first term by the second I should have said

OpenStudy (anonymous):

but that would just get me 2?

OpenStudy (welshfella):

-1 / -2 = ?

OpenStudy (er.mohd.amir):

every term divide by 2 so last term/2 is ans

OpenStudy (anonymous):

-1/2

OpenStudy (welshfella):

to get the next term divide by 2 (as Ex.Mohd said) or multiply by 1/2 (which is the same thing)

OpenStudy (welshfella):

its a geometric sequence with common ratio 1/2

OpenStudy (anonymous):

so is the next term 1/4

OpenStudy (welshfella):

no the next term is -1/4 * 1/2

OpenStudy (anonymous):

ohhh i was adding

OpenStudy (welshfella):

keep on multiplying by 1/2 to get the nest term(s)

OpenStudy (anonymous):

oops

OpenStudy (anonymous):

okay thanks

OpenStudy (welshfella):

yw

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