Minimum value - Jamb Mathematics Past Questions and Answers

Question 1:

• JAMB 1979

The mean of the numbers 1.2, 1.0, 0.9, 1.4, 0.8, 0.8, 1.2 and 1.1 is

A. 1.5
B. 0.8
C. 1.0
D. 1.02
E. 1.05

Question 2:

• JAMB 2014

Find the minimum value of y = x² - 2x - 3

A. 4
B. 1
C. -1
D. -4

Question 3:

• JAMB 1990

At what value of x is the function x\(^2\) + x + 1 minimum?

A. -1
B. \(-\frac{1}{2}\)
C. \(\frac{1}{2}\)
D. 1

Question 4:

• JAMB 1991

At what value of x is the function y = x² - 2x - 3 minimum?

A. 1
B. -1
C. -4
D. 4

Question 5:

• JAMB 1997

Find the minimum value of X² - 3x + 2 for all real values of x

A. -\(\frac{1}{4}\)
B. -\(\frac{1}{2}\)
C. \(\frac{1}{4}\)
D. \(\frac{1}{2}\)