Question:`a^3 + b^3 + c^3, a^3 - b^3 + c^3, -a^3 - b^3 - c^3`  তিনটি বীজগণিতীয় রাশি।দ্বিতীয় রাশির `b^3` এর সহগ কত ? 

A 2 
B 1 
C - 1 
D -2 

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C 

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Irin Moni

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