Arithmetic and Geometric Sequences and Series

What are the next 3 terms in this sequence of terms? 3, 7, 11, 15

• 18, 22, 26
• 19, 21, 23
• 19, 23, 27
• 18, 21, 24

What is a₅ in the sequence defined as follows?
a_n = 5 ⋅ 2^(n-1) 

• a₅ = 160
• a₅ = 40
• a₅ = 10
• a₅ = 80

Evaluate the geometric series below:
a₁ = -2, a_n = -1458, r = 3

• -2186
• -2408
• 1
• -2703

Evaluate the arithmetic series described:
a₁ = 5, a_n = 145, Find S₁₅

• 1125
• 2255
• 2250
• 2258

Find the 25th term of the sequence if a₁ = 5 and d = 0.5

• 18
• 17
• 15
• 14

Find the first term of the given sequence:
a₁₄=68
d=3

• 14
• 20
• 26
• 29

Edgar is getting better at math.  On his first quiz he scored 57 points, then he scores 61 and 65 on his next two quizzes.  If his scores continued to increase at the same rate, what will be his score on his 9th quiz?

• Arithmetic
• Geometric
• Neither

An auditorium has 20 seats on the first row, 24 seats on the second row, 28 seats on the third row, and so on and has 30 rows of seats. How many seats are in the last row?

• Arithmetic
• Geometric
• Neither

Evaluate the arithmetic series described:
a₁ = 12, a_n = 64, Find S₁₄

• 1082
• 532
• 541
• 1064

John has purchased 20 books. The 1st book cost $1, the 2nd cost $2, the 3rd cost $4, and the 4th cost $8, and so on. How much did John pay for the 20 books?

• $1, 048, 575
• $2, 000, 000
• $1, 555, 119