Paper 1 October/November 2010 MATHEMATICS (9709/11) A Levels
لطفا برای اطمینان از عملکرد و تجربه بهتر از مرورگرهای مدرن و به روز مانند کروم یا فایرفاکس استفاده کنید.

a) The sixth term of an arithmetic progression is 23 and the sum of the first ten terms is 200. Find the seventh term.
b) A geometric progression has first term 1 and common ratio $r$. A second geometric progression has first term 4 and common ratio $\frac{1}{4}r$. The two progressions have the same sum to infinity, $S$. Find the values of $r$ and $S$.