Progression - Jamb Mathematics Past Questions and Answers

Question 36:

• JAMB 1995

Find the sum to infinity of the following sequence \(1, \frac{9}{10}, (\frac{9}{10})^{2}, (\frac{9}{10})^{3}\)

A. \(\frac{1}{10}\)
B. \(\frac{9}{10}\)
C. \(\frac{10}{9}\)
D. 10

Question 37:

• JAMB 1995

A worker's present salary is N24,000 per annum. His annual increment is 10% of his basic salary. What would be his annual salary at the beginning of the third year?

A. N28,800
B. N29,040
C. N31,200
D. N31,944

Question 38:

• JAMB 1995

The 4th term of an A.P. is 13 while the 10th term is 31. Find the 21st term.

A. 175
B. 85
C. 64
D. 45

Question 39:

• JAMB 1995

Find the sum to infinity of the following sequence \(1, \frac{9}{10}, (\frac{9}{10})^{2}, (\frac{9}{10})^{3}\)

A. \(\frac{1}{10}\)
B. \(\frac{9}{10}\)
C. \(\frac{10}{9}\)
D. 10

Question 40:

• JAMB 1997

Sn is the sum of the first n terms of a series given by Sn = n\(^2\) - 1. Find the nth term

A. 4n + 1
B. 4n - 1
C. 2n + 1
D. 2n - 1