1.

यदि `a^(2)+b^(2)+c^(2)+3=2(a+b+c)` है तो `(a+b+c)` का मान ज्ञात करें।A. 2B. 3C. 4D. 5

Answer» Correct Answer - B
`a^(2)+b^(2)+c^(3)+3=2(a+b+c)`
`a^(2)+b^(2)+c^(2)+3=2a+2b+2c`
`a^(2)-2a+1+b^(2)-2b+1+c^(2)-2c`
`+1=0`
`(a-1)^(2)+(b-1)^(2)+(c-1)^(2)=0`
`a=1`
`b=1`
`c=1`
`(a+b+c)implies 1+1+1=3`


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