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If a + b + c = 7 and a^3+b^3+c^3-3abc =1...

If a + b + c = 7 and `a^3+b^3+c^3-3abc =175`, then what is the value of (ab + bc + ca) ?
यदि a + b + c = 7 और `a^3+b^3+c^3-3abc =175`, तो (ab + bc + ca) का मान क्या होगा?

A

7

B

8

C

6

D

9

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CHAMPION PUBLICATION-2019 TIER-II PAPER (2)-EXERCISE
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  18. What is the area (in sq. units) of the triangle formed by the graph of...

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  19. To do a certain work, the ratio of the efficiencies of A and B is 7: 5...

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