Question

Find the determinant A=3i+2j
B=j+ 2k

Answer 1

Hope it helps u
Thanks

Answer 2

hello friend...!!!

⇒ to find the determinant of A = 3i + j and B = j + 2k

⇒$\left[\begin{array}{ccc}i&j&k\\3&1&0\\0&1&2\end{array}\right]$

⇒ i ( 2 - 0 ) -j ( 6 - 0 ) + k ( 3 - 0)

⇒ 2 i - 6j + 3k 

the magnitude = 

√ ( 2)² +(-6)² + (3)²

√4+ 36 + 9

√49

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hope it helps...!!