a^3+b^3+c^3-3abc का formula
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a^3+b^3+c^3-3abc का formula

a^3+b^3+c^3-3abc=(a+b+c) (a^2+b^2+c^2-ab-bc-ac) 

⇒यदि (a+b+c) =0 तब a^3+b^3+c^3-3abc=0 होगा। 

⇒यदि a^3+b^3+c^3-3abc=0 तब a+b+c=0

और a^2+b^2+c^2=ab+bc+ac

Q. यदि a+b+c=0 है तो a^(3)+b^(3)+c^(3)

हल:- दिया गया है कि a+b+c=0 

प्रश्नानुसार, a^(3)+b^(3)+c^(3)=a^(3)+b^(3)+c^(3)-3abc+3abc

यदि  a+b+c=0 तब a^3+b^3+c^3-3abc=0 

= 0+3abc

=3abc Ans


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