UPSC CDS 1 2021 Math Paper
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Question : 37 of 100
Marks:
+1,
-0
If a + b + c = 0
I.a 3 + b 3 + c 3 = 3 a b c
II.a 2 + b 2 + c 2 = − 2 ( a b + b c + c a )
III.a 3 + b 3 + c 3 = − 3 a b ( a + b )
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I.
II.
III.
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