1.

यदि `sqrt(1+x/9)=13/3` है तो `x` का मान करें?A. `1439/9`B. `160`C. `1443/9`D. `169`

Answer» Correct Answer - B
`sqrt(1+x/9)=13/3`
By option
Put `x=160`
`sqrt(1+160/9)=sqrt(169/9)=13/3`
Alternate:
Squaring both sides
`(sqrt(1+x/9))^(2)=(13/3)^(2)`
`implies 1+x/9=169/9`
`implies(9+x)/9=169/9`
`9+x=169`
`x=160`


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