1. Today’s Objectives: Today’s Agenda Given the partial sum of a geometric series, find the specific n th term Find partial sums of arithmetic and geometric series 1.Do Now Due Tomorrow: HW #33 Page 661 #23 – 28 Page 659 #6 Page 660 #15 - 22 4.Summary 3.Work Time

2. SWBAT… Given the term value of a geometric sequence, find the specific n th term Find partial sums of arithmetic and geometric series Explicit formula for Geometric Sequence If we know that one of the terms has the value 2657205, how could you find what term number it is? Let’s do an example: t 1 = 15 and r = 3 Explicit formula:

3. SWBAT… Given the term value of a geometric sequence, find the specific n th term Find partial sums of arithmetic and geometric series Find a term number of a geometric sequence

4. SWBAT… Given the term value of a geometric sequence, find the specific n th term Find partial sums of arithmetic and geometric series Explicit Formula for n th Partial Sum of Geometric Series If we know that a partial sum is 35872260, how could you find what n is? Let’s use our example wheret 1 = 15 and r = 3

5. Find n Given a Partial Sum of a Geometric Series