5. Let a, b, c such that 11. T ーーーー 1- 1-2K 1-3x a (1-x)(1-2x)(1-3x) abc -+-+-= (EAMCET-2003) 13

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( frac{1}{(1-x)(1-2 x)(1-3 x)}=frac{a}{1-x}+frac{b}{1-2 x}+frac{c}{1-3 x} ) ( 1=a(1-2 x)(1+3 x)+b(1-x)(1-3 x) ) ( +c(1-x)(1-2 x) ) put ( x=1 ) ( 1=a(1-2)(1-3)+b(0)+c(0) )

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