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[" 37.If "a,b" and "c" are real and "Del...

[" 37.If "a,b" and "c" are real and "Delta=|[b+c,c+a,a+b],[c+a,a+b,b+c],[a+b,b+c,c+a]|=0" ,then show that "],[" either "a+b+c=0" or "a=b=c,quad [NCERT;CBSE]

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