1.

यदि `(3a+1)^(2)+(b-1)^(2)+(2c-3)^(2)=0`, है तो `(3a+b+2c)` का मान क्या होगा?A. 3B. `-1`C. `2`D. `5`

Answer» Correct Answer - A
`(3a+1)^(2)+(b-1)^(2)+(2c-3)^(2)=0`
`=(3a+1)^(2)=0`
`implies 3a=-1implies a=(-1)/3`
`(b-1)^(2)=0impliesb-1=0`
`implies b=1`
`(2c-3)=0impliesc=3/2`
`:. 3a+b+2c=3xx(-1)/3+1+3/2xx2`
`=-1+1+3=3`


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