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8 January, 17:15

Find the limit of the function algebraically.

limit as x approaches five of quantity x squared minus twenty five divided by quantity x minus five.

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  1. 8 January, 18:45
    0
    Factor x^2 - 25 as

    x^2-5^2

    = (x+5) (x-5)

    so,

    (x^2-25) / (x-5) = (x+5) (x-5) / (x-5) = x+5

    limit of x->5 of (x+5)

    can be just found by plugging in x = 5.

    lim x->5 (x+5) = 5+5 = 10.

    so the limit value = 10
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