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problem on determinant



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1

1

 use the properties  to extract (a+b+c)
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then you get a column of 1's. fix one of them and make the other
elements in that column to 0 before expanding
use the identity
(a+b+c)(a ² +b ² +c ²  -ab-bc-ca) = a ³ +b ³ +c ³ -3abc
 answer and  some steps are given below
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integration formulae
collection of revision questions



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list of  formulae and notes on some math topics
formulae on sequences and series
(trig. formulae) 
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