1.

If a + b + c = 9 and ab + bc + ca =23, then a3 + b3 + c3 − 3abc =(a) 108(b) 207(c) 669(d) 729

Answer» If a + b + c = 9 and ab + bc + ca =23, then a3 + b3 + c3 − 3abc =



(a) 108



(b) 207



(c) 669



(d) 729


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