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Evaluate limx→0f(x) where f(x)={|x|xx≠00x=0 - Mathematics

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प्रश्न

Evaluate `lim_(x -> 0) f(x)` where `f(x) = { (|x|/x, x != 0),(0, x = 0):}`

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उत्तर

If x < 0, |x| = −x

∴ `lim_("x" → 0^-) f("x") = lim_("x" → 0^-) |"x"|/"x" = lim_("x" → 0^-)( (-"x")/"x") = -1`

And if x > 0, |x| = x

∴ `lim_("x" → 0^+) f("x") = lim_("x" → 0^+) |"x"|/"x" = lim_("x" → 0^+) ( "x"/"x") = 1`

∴ `lim_("x" → 0^-) f("x") ≠ lim_("x" → 0^+) f("x")`

Hence, the equation does not exist at x = 0.

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पाठ 13: Limits and Derivatives - Exercise 13.1 [पृष्ठ ३०२]

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एनसीईआरटी Mathematics [English] Class 11
पाठ 13 Limits and Derivatives
Exercise 13.1 | Q 25 | पृष्ठ ३०२

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