First slide

Applications of determinant

Question

$If A = [\begin{array}{lll} 1 3 3 \\ 1 3 4 \\ 1 4 3 \end{array}], Then A has$

Moderate

A

unique inverse
B

no inverse
C

two inverses
D

infinitely many inverses

Solution

$\begin{array}{l} \det A = 1 (9 - 16) - 3 (3 - 4) + 3 (4 - 3) \\ = - 7 + 3 + 3 \\ = - 1 \\ \neq 0 \end{array}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App