AP EAMCET Engineering 26 Apr 2017 Shift 1 Paper

Section: Mathematics

Question : 4 of 160

Marks: +1, -0

If a,b,c are non zero real numbers and if the equations (a−1)x=y+z,(b−1)y =z+x,(c−1)z=x+y have a non-trivial solution, then ab+bc+ca=

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