1.

`[{:(x,x+1),(x-1,x):}]` का मान ज्ञात कीजिए।

Answer» `[{:(x,x+1),(x-1,x):}]=x""xxx-(x+1)(x-1)`
`=x^(2)-(x^(2)-1)`
`=x^(2)-x+1`
=1.


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