यदि x = b + c, y = c + a, z = a + b है; तो (x + y + z)3 – 24xyz किसके बराबर है?

1
a+ b+ c3
2
2 (a3 + b3 + c3)
3
8 (a3 + b3 + c3)
4
उपर्युक्त में से कोई नहीं

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