Jamb Mathematics Questions
Question 446:
Find the inverse \(\begin{pmatrix} 5 & 3 \\ 6 & 4 \end{pmatrix}\)
- A \(\begin{vmatrix} 2 & -\frac{3}{2} \\ -3 & -\frac{5}{2} \end{vmatrix}\)
- B \(\begin{vmatrix} 2 & -\frac{3}{2} \\ -3 & \frac{5}{2} \end{vmatrix}\)
- C \(\begin{vmatrix} 2 & \frac{3}{2} \\ -3 & \frac{5}{2} \end{vmatrix}\)
- D \(\begin{vmatrix} 2 & \frac{3}{2} \\ -3 & \frac{5}{2} \end{vmatrix}\)
Question 447:
If y = x sin x, find \(\frac{\delta y}{\delta x}\)
- A Sin x - cos x
- B Cos x - x sin x
- C Cos x + x sin x
- D Sin x + x cos x
Question 448:
If y = (2x + 2)\(^3\), find \(\frac{\delta y}{\delta x}\)
- A 3(2x +2)<sup style='font-size: smaller;'>2</sup>
- B 6(2x +2)
- C 3(2x +2)
- D 6(2x +2)<sup style='font-size: smaller;'>2</sup>
Question 449:
The radius of a circle is increasing at the rate of 0.02cms-1. Find the rate at which the area is increasing when the radius of the circle is 7cm.
- A 0.75cm<sup style='font-size: smaller;'>2</sup>S<sup style='font-size: smaller;'>-1</sup>
- B 0.53cm<sup style='font-size: smaller;'>2</sup>S<sup style='font-size: smaller;'>-1</sup>
- C 0.35cm<sup style='font-size: smaller;'>2</sup>S<sup style='font-size: smaller;'>-1</sup>
- D 0.88cm<sup style='font-size: smaller;'>2</sup>S<sup style='font-size: smaller;'>-1</sup>