Question

if a+b+c=o then prove a^3+b^3+c^3=3ab

Answer 1

Step-by-step explanation:

a

3

+b

3

+c

3

−3abc=(a+b+c)(a

2

+b

2

+c

2

−ab−bc−ca)

Putting a+b+c=0 on RHS, we get,

a

3

+b

3

+c

3

−3abc=0

⟹a

3

+b

3

+c

3

=3abc, Hence proved.

Answer 2

Answer:

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