1.

Evaluate the following determinants: [[1,2,3],[3,5,7],[8,14,20]]

Answer»

SOLUTION :`[[1,2,3],[3,5,7],[8,14,20]]=2[[1,2,3],[3,5,7],[4,7,10]]`
`2[[1,2,3],[3,5,7],[3,5,7]] (R_3=R_3-R_1)`
=0 `(because R_2=R_3)`


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