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underset(x to 4)"Lt" (sqrt(x)-2)/(x-4) =...

`underset(x to 4)"Lt" (sqrt(x)-2)/(x-4)` =?

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`underset(x to 4)"Lt" (sqrt(x)-2)/(x-4)=underset(x to 4)"Lt" (x-4)/((x-4)(sqrt(x)+2))`
`underset(x to 4)"Lt" 1/(sqrt(x)+2), because x to 4`
`x-4 ne 0`
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