CBSE Class 12 Math 2009 Solved Paper

Question : 10 of 29

Marks: +1, -0

Write the value of the determinant

|\table 2,3,4;5,6,8;6x,9x,12x|

Solution:

Δ =

|\table 2,3,4;5,6,8;6x,9x,12x|

R_3

→

1/{3x} R_3

Δ = 3x

|\table 2,3,4;5,6,8;2,3,4|

Now ,

R_1

R_3

∴ Δ = 0

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