1.

यदि `(log_(3) x)^(2) + (log_(3) x) lt 2` हो , तो निम्नलिखित में से कौन- सा सही है ?A. ` 0 lt x lt 1/9`B. ` 1.9 lt x lt 3`C. ` 3 lt x lt infty`D. ` 1/9 le x le 3`

Answer» Correct Answer - B
`(log_(3) x)^(2) + (log _(3) x) lt 2`
` rArr (log_(3) x)^(2) + (log_(3) x) - 2 lt 0`
` rArr (log_(3) x + 2) (log_(3) x -1) lt 0`
` rArr -2 lt log_(3) x lt 1`
` rArr 1/9 lt x lt 3`


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