ARITHMETIC SEQUENCE

Which of the following sequences is not an arithmetic sequence?

• -10; -6; -2; 2

• 5;8;11;13

• 1;2;3;4;5

• 1/2; 0; -1/2

Given an arithmetic sequence with 8 terms, where the first term is 3 and the last term is 24, find the sum of all terms.

• 105

• 27

• 108

• 111

Given an arithmetic sequence with u1=6, u2=12, find d?

• 5

• 7

• 6

• 8

Given an arithmetic sequence: 11; x; 19. Find x

• 15

• 14

• 16

• 17

When a skydiver jumps out of an airplane, assuming the distance they fall freely (measured in feet) in each consecutive second before deploying the parachute follows the sequence:
16, 48, 80, 112, 144, ... Find u1, d

• u1=16; d=32

• u1=48; d=32

• u1=16; d=22

• u1=16; d=31