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Prove that {:|( a,a+b,a+b+c) ,( 2a,3a+2...

Prove that `{:|( a,a+b,a+b+c) ,( 2a,3a+2b,4a+3b+2c),( 3a,6a+3b,10a+6b+3c)|:}=a^(3) `

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The correct Answer is:
` =a (a^(2) -0) =a ( a^(2) )= a^(3) `
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