मराठी

Find limx→5f(x), where f(x) = |x| - 5

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प्रश्न

Find `lim_(x -> 5) f(x)`, where f(x)  = |x| - 5

बेरीज
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उत्तर

`f(x) = |x| - 5`

`lim_(x → 5^-) f(x) = lim_(x → 5^-) [|x| - 5]`

= `lim_(h → 0) [|5 - h| - 5]`

= `lim_(h → 0) [5 - h - 5] = lim_(h → 0) (-h) = 0`

= `lim_(x → 5^+) f(x) = lim_(x → 5^+) [|x| - 5] = lim_(h → 0) [|5 + h| - 5]`

= `lim_(h → 0) [5 + h - 5] = lim_(h → 0) h = 0`

∴ `lim_(x → 5^-) f(x) = lim_(x → 5^+) f(x)`

∴ `lim_(x → 5) f(x) = 0`

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पाठ 12: Limits and Derivatives - EXERCISE 12.1 [पृष्ठ २३८]

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एनसीईआरटी Mathematics [English] Class 11
पाठ 12 Limits and Derivatives
EXERCISE 12.1 | Q 27. | पृष्ठ २३८

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