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# C2 Maths Question help watch

1. 7) Show that the infinite sum of 256 + 192 + 144 + .... is 1024 (done this)
Find the least number of terms 256 + 192 + 144 + .... is within 1 x 10^-6 of 1024

What does the last part of the question even mean? I feel incredibly stupid, but I might not have been in the lesson something like this was taught and my teacher probably neglected to tell to go over this
2. (Original post by JVR12)
7) Show that the infinite sum of 256 + 192 + 144 + .... is 1024 (done this)
Find the least number of terms 256 + 192 + 144 + .... is within 1 x 10^-6 of 1024

What does the last part of the question even mean? I feel incredibly stupid, but I might not have been in the lesson something like this was taught and my teacher probably neglected to tell to go over this
If a number x is within .... of .... (eg within 5 of 23...) then for example. And 1x10^-6 is .

Admittedly I'm unsure of whether the 'within' implies strict or not but chances are it won't matter for your question.

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Updated: January 15, 2017
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