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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