Jamb Mathematics 2014 Past Questions and Answers

Question 81:

• JAMB 2014

If y = cos 3x, find \(\frac{\delta y}{\delta x}\)

A. \(\frac{1}{3} \sin 3x\)
B. \(-\frac{1}{3} \sin 3x\)
C. 3 sin 3x
D. -3 sin 3x

Question 82:

• JAMB 2014

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

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

Question 83:

• JAMB 2014

Evaluate \(\int \sin 2x dx\)

A. Cos 2x + k
B. \(\frac{1}{2}\)cos 2x + k
C. \(-\frac{1}{2}\)cos 2x + k
D. -cos 2x + k

Question 84:

• JAMB 2014

Evaluate \(\int (2x + 3)^{\frac{1}{2}} \delta x\)

A. \(\frac{1}{12} (2x + 3)^6 + k\)
B. \(\frac{1}{3} (2x + 3)^{\frac{1}{2}} + k\)
C. \(\frac{1}{3} (2x + 3)^{\frac{3}{2}} + k\)
D. \(\frac{1}{12} (2x + 3)^{\frac{3}{4}} + k\)

Question 85:

• JAMB 2014

The mean of 2 - t, 4 + t, 3 - 2t, 2 + t and t - 1 is

A. T
B. -t
C. 2
D. -2