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# c2 help with geometric sequences

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1. c2 help with geometric sequences

I've finished 13 part a but I can't understand the solution for 13 part b

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Last edited by desertautumn; 13-05-2012 at 23:15. Reason: i posted the wrong set of solution XD sorry
2. Re: c2 help with geometric sequences
(Original post by desertautumn)

I've finished 13 part a but I can't understand the solution for 13 part b

Initial speed is . So to run one kilometre takes 1/12 hrs or 60/12 minutes. 60/12 = 5.
3. Re: c2 help with geometric sequences
(Original post by ghostwalker)
Initial speed is . So to run one kilometre takes 1/12 hrs or 60/12 minutes. 60/12 = 5.
thank you for trying to help me, however, i'm still a bit confused because even before the whole thing has been converted to minutes.. '5' was already there.. i still don't know where it came from..i'm referring to question part b and i'm sorry for posting the wrong set of solutions earlier which might have caused the confusion..
4. Re: c2 help with geometric sequences
(Original post by desertautumn)
thank you for trying to help me, however, i'm still a bit confused because even before the whole thing has been converted to minutes.. '5' was already there.. i still don't know where it came from..i'm referring to question part b and i'm sorry for posting the wrong set of solutions earlier which might have caused the confusion..
The first line of the solution to part b) is in minutes, and the 5 is the length of time, in minutes, it took to run each of the first 15 km.

This is multiplied by 1.2 to get the time for the 16th km, etc.
5. Re: c2 help with geometric sequences
(Original post by ghostwalker)
The first line of the solution to part b) is in minutes, and the 5 is the length of time, in minutes, it took to run each of the first 15 km.

This is multiplied by 1.2 to get the time for the 16th km, etc.
thanks for the help

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Last updated: May 14, 2012
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