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Urgent Help in Maths Paper 2

Thread starter Stefan Salvatore
Start date Apr 20, 2016

Apr 20, 2016

#1

Stefan Salvatore

Hi, in dire need of some urgent help:
Q: Find how many terms there are in the geometric sequence using logarithms:
-1, 2, -4, 8, ....., -16777216

a= -1

r= -2

nth term (last term) = ar^n-1

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