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 November 3rd, 2016, 02:55 PM #1 Newbie   Joined: Oct 2016 From: UK Posts: 7 Thanks: 0 Arithmetic Sequence & Geometric Sequence Question I can't formulate a method for the following question: An arithmetic sequence is defined by un = 12n - 7 and a geometric sequence is defined by vn = 0.3(1.2)^(n-1). Find the least no. of terms such that vn > un. Could somebody help me out?
 November 3rd, 2016, 04:17 PM #2 Global Moderator   Joined: Dec 2006 Posts: 20,109 Thanks: 1909 For n = 41, 12n - 7 = 485 and 0.3(1.2)^(n-1) = 440.9... For n = 42, 12n - 7 = 497 and 0.3(1.2)^(n-1) = 529.1... Hence the answer is 42.

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