ଯଦି (a + b + c) = 14, ଏବଂ (a 3 + b 3 + c 3 - 3abc) = 98, ତେବେ (ab + bc + ca) ର ମୂଲ୍ୟ ନିର୍ଣ୍ଣୟ କର  |

1
60
2
64
3
65
4
63

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