1.

यदि `x=2,y=1` और `z=-3` है तो `x^(3)+y^(3)+z^(3)-3xyz` किसके बराबर है?A. 6B. 0C. 2D. 8

Answer» Correct Answer - B
According to the question
`x=2, y=1, z=-3`
`:. x^(3)+y^(3)+z^(3)-3xyz=?`
As we know that
`a+b+c=0` then `a^(3)+b^(3)+c^(3)`
`-3abc=0`
`:. 2+1-3=0`
`x^(3)+y^(3)+3^(3)-3xy=0`


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