\(\frac{2}{3}\)
2
3
\(\frac{3}{2}\)
Correct answer is D
For perpendicular vectors, their dot product = 0.
\((4i - kj). (3i + 8j) = 12 - 8k = 0\)
\(8k = 12 \implies k = \frac{3}{2}\)
The mean of 2, 5, (x + 2), 7 and 9 is 6. Find the median. ...
If \(\begin{pmatrix} 2 & 1 \\ 4 & 3 \end{pmatrix}\)\(\begin{pmatrix}...
Find the unit vector in the direction of the vector \(-12i + 5j\)...
Given that \(y = x(x + 1)^{2}\), calculate the maximum value of y....
Find the inverse of \(\begin{pmatrix} 4 & 2 \\ -3 & -2 \end{p...
The angle of a sector of a circle is 0.9 radians. If the radius of the circle is 4cm, find the ...
Given that \(q = 9i + 6j\) and \(r = 4i - 6j\), which of the following statements is true?...
Adu's scores in five subjects in an examination are 85, 84, 83, 86...