[x – 5] mũ 4 = [x-5] mũ 5

Question

[x – 5] mũ 4 = [x-5] mũ 5

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Neala 1 year 2020-10-22T13:42:14+00:00 2 Answers 92 views 0

Answers ( )

    0
    2020-10-22T13:43:17+00:00

    (x – 5)^4 = (x – 5)^5

    (x – 5)^4 – (x – 5)^5 = 0

    (x – 5)^4 . [1 – (x – 5)] = 0

    Xét 2 TH:

    +) TH1: (x – 5)^4 = 0

    x – 5 = 0

    x = 5

    +) TH2: 1 – (x – 5) = 0

    x – 5 = 1

    x = 6

    Vậy x = 5 hoặc x = 6

    0
    2020-10-22T13:43:31+00:00

    `(x – 5)^4 = (x – 5)^5`

    `↔ x – 5 = 0` hoặc `x – 5 = 1`

    `↔ x = 5` hoặc `x = 6`

    Vậy `x = 5` hoặc `x = 6`

     

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