Question

What is the determinant of mc025-1.jpg?

Answer 1

A=

⎣

⎢

⎡

−2

0

0

2

3

0

b

a

−5

⎦

⎥

⎤

To Find:

determinant A i.e |A| = ?

Solution:

Determinant A is given as

\begin{gathered}|A|=-2(3\times -5-0\times a)-2(0\times -5-0\times a)+b(0\times 0-0\times 3)\\\\|A|=-2(-15)-2(0)+b(0)\\\\|A|=30\end{gathered}

∣A∣=−2(3×−5−0×a)−2(0×−5−0×a)+b(0×0−0×3)

∣A∣=−2(−15)−2(0)+b(0)

∣A∣=30