Math Question - english translation issue

OceanSeal
Thu, 03 Nov 2011 13:40:34 +0000

I don’t quite understand why the factor would be 2n+1 and 2n+3. Where did the 2 come from?

The answer in Princeton Review was 10.

Yeah, the wording is confusing. Hopefully collegeboard writers will only ask questions that are not ambiguous.