1.

If △=∣∣∣∣∣1xx21yy21zz2∣∣∣∣∣ and △1=∣∣∣∣111yzzxxyxyz∣∣∣∣, then the value of △1+△=

Answer» If =

1xx21yy21zz2

and 1=
111yzzxxyxyz
,
then the value of 1+=




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