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Evaluate: limh→0x+h-xh

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प्रश्न

Evaluate: `lim_(h -> 0) (sqrt(x + h) - sqrt(x))/h`

योग
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उत्तर

Given that `lim_(h -> 0) (sqrt(x + h) - sqrt(x))/h`

= `lim_(h -> 0) (sqrt(x + h) - sqrt(x))/(h[sqrt(x + h) + sqrt(x)]) xx sqrt(x + h) + sqrt(x)`   ....[Rationalizing the denominator]

= `lim_(h -> 0) (x + h - x)/(h[sqrt(x + h) + sqrt(x)]`

= `lim_(h -> 0) h/(h[sqrt(x + h) + sqrt(x)]`

= `lim_(h -> 0) 1/(sqrt(x + h) + sqrt(x))`

Taking the limits, we have

`1/(sqrt(x) + sqrt(x)) = 1/(2sqrt(x))`

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 13: Limits and Derivatives - Exercise [पृष्ठ २३९]

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एनसीईआरटी एक्झांप्लर Mathematics Exemplar [English] Class 11
अध्याय 13 Limits and Derivatives
Exercise | Q 3 | पृष्ठ २३९

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