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If a+b+c=6, a^3+b^3+c^3-3abc = 342, then...

If a+b+c=6, `a^3+b^3+c^3`-3abc = 342, then what is the value of ab+bc+ca?

A

8

B

-7

C

-5

D

5

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If a^(3)+b^(3)+c^(3)-3abc=126 , a+b+c=6 then the value of (ab+bc+ca) is :

CHAMPION PUBLICATION-2019 TIER-II PAPER (1)-EXERCISE
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