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Select the correct answer from the given alternatives. limx→3(1x2-11x+24+1x2-x-6) = - Mathematics and Statistics

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Question

Select the correct answer from the given alternatives.

`lim_(x -> 3) (1/(x^2 - 11x + 24) + 1/(x^2 - x - 6))` = 

Options

  • `-2/25`

  • `2/25`

  • `7/25`

  • `-7/25`

MCQ
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Solution

`lim_(x -> 3) (1/(x^2 - 11x + 24) + 1/(x^2 - x - 6))` =  `-2/25`

Explanation:

`lim_(x -> 3) (1/(x^2 - 11x + 24) + 1/(x^2 - x - 6))` 

= `lim_(x->3)[1/((x - 8)(x - 3)) + 1/((x - 3)(x + 2))]`

= `lim_(x->3)(2 x - 6)/((x - 8)(x - 3)(x + 2))`

= `lim_(x->3)(2)/((x - 8)(x + 2))`

= `-2/25`

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Chapter 7: Limits - Miscellaneous Exercise 7.1 [Page 158]

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