1. The sigma notation IB SL/HL

2. A Greek letter - in maths it translates as the sum of start term r=1 end term r=5 the sum of the first 5 terms What type of series is it? Make r=1, r=2,.... r=1, 4-1=3 r=2, 8-1=7 r=3, 12-1=11 3, 7, 11,.... AP: u 1 =3, d=4, n=5 =55

3. Find the following information: 1. Type of series (AP or GP) 2. n 3. u 1 4. difference (d) or ratio (r) 5. The sum 1. 8, 16, 32,.... a GP 2. n=6 (careful.. use your fingers to count) 3. u 1 = 8 4. r = 2 5. 504

4. Solve each of the following sums 1. GP: 265680 2. AP: 858 3. GP: 1023 4. GP: 286375 5. AP: 102.5 6. AP: 10400