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Question

Find the value of (28)3(78)3+(50)3

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Solution

Let a=28,b=78,c=50
Then a+b+c=2878+50=0
Using, If (a+b+c)=0 ,then a3+b3+c3=3abc
a3+b3+c3=3abc
So (28)3+(78)3+(50)3=3×28×(78)×50=327600

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