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सिद्ध कीजिए-`|(a,a+b,a+b+c),(2a,3a+2b,4a+3b+2c),(3a,6a+3b,10a+6b+3c)|=a^3`

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यहाँ `|(a,a+b,a+b+c),(2a,3a+2b,4a+3b+2c),(3a,6a+3b,10a+6b+3c)|`
`|(a,a+b,a+b+c),(0,a,2a+b),(0,3a,7a+3b)|`
संक्रियांओं `R_2toR_2-2R_1` और `R_3toR_3- 3R_1` से )
`=|(a,a+b,a+b+c),(0,a,2a+b),(0,0,a)|`,
संक्रिया `R_3toR_3-3R_2` से )
`=a|(a,2a+b),(0,a)|`
(`C_1` के अनुदिश प्रसार करने पर )
`=axx(a^2-0)`
`=a^3=R.H.S`.

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