1.

यदि `x+y=z` है तो व्यंजक `x^(3)+y^(3)-z^(3)+3xyz` किसके बराबर है?

Answer» Correct Answer - A
`x+y=z`
`x+y-z=0`
If `a+b+c=0`
then `a^(3)+b^(3)+c^(3)-3abc=0`
`:. x^(3)+y^(3)-z^(3)=-3xyz`
`:. x^(3)+y^(3)-z^(3)+3xyz=0`
`=3xyz-3xyz=0`


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