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Question

Using suitable identity, evaluate (32)3+(18)3+(14)3

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Solution

Let a=32,b=18,c=14

We see that

a+b+c=32+18+14=0

Now as we know that,

If a+b+c=0

then a3+b3+c3=3abc

So (32)3+(18)3+(14)3=3(32)(18)(14)

(32)3+(18)3+(14)3=24192

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