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Write the value of the determinant |[2, ...

Write the value of the determinant `|[2, 3, 4],[ 5, 6, 8],[ 6x,9x, 12 x]|`

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`A = |[2,3,4],[5,6,8],[6x,9x,12x]|`
`A= =3x|[2,3,4],[5,6,8],[2,3,4]|`
Applying `R_3->R_1-R_3`
`A=3x|[2,3,4],[5,6,8],[0,0,0]|`
We know if a row or column in a determinant is `0`, then value of that determinant is `0`.
In our determinant , `R_3` is `0`.
`:. A = |[2,3,4],[5,6,8],[6x,9x,12x]| = 0`
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XII BOARDS PREVIOUS YEAR-BOARD PAPER SOLUTIONS-All Questions
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  2. Using principal value, evaluate the following: sin^(-1)(sin ((3pi)/5...

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  18. For what value of p , is ( hat i+ hat j+ hat k)p a unit vector?

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