Progression - Jamb Mathematics Past Questions and Answers

Question 21:

• JAMB 1988

If 7 and 189 are the first and fourth terms of geometric progression respectively, find the sum of the first three terms of the progression

A. 182
B. 91
C. 63
D. 28

Question 22:

• JAMB 1989

The sum of the first two terms of a geometric progression is x and sum of the last terms is y. If there are n terms in all, then the common ratio is

A. \(\frac{x}{y}\)
B. \(\frac{y}{x}\)
C. (\(\frac{x}{y}\))^{\(\frac{1}{n - 2}\)}
D. (\(\frac{y}{x}\))^{\(\frac{1}{n - 2}\)}

Question 23:

• JAMB 1989

If -8, m, n, 19 are in arithmetic progression, find (m, n)

A. 1, 10
B. 2, 10
C. 3, 13
D. 4, 16

Question 24:

• JAMB 1990

Find the sum of the first twenty terms of the progression log a, log a², log a³.....

A. Log a²⁰
B. Log a²¹
C. Log a²⁰⁰
D. Log a²¹⁰

Question 25:

• JAMB 1990

Find the sum of the first 18 terms of the progression 3, 6, 12......

A. 3(2¹⁷ - 1)
B. 3(2¹⁸ - 1)
C. 3(2¹⁸ + 1)
D. 3(2¹⁷ - 1)