1.

यदि `a+b+c=0` तो `(a^(2)+b^(2)+c^(2))/(ab+bc+ca)` का मान कितना होगा?A. 2B. -2C. 0D. 4

Answer» Correct Answer - B
If `a+b+c=0`
put `a=1 b=1` and `c=-2`
`(a^(2)+b^(2)+c^(2))/(ab+bc+ca)=(1+1+4)/(1-2-2)=6/(-3)=-2`


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