Cho f(x) = ax+b xác định a+b bt f(x-1)=-x+3 vs mọi R

Question

Cho f(x) = ax+b xác định a+b bt f(x-1)=-x+3 vs mọi R

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Sapo 4 years 2020-10-14T23:25:27+00:00 2 Answers 121 views 0

Answers ( )

  1. Calantha
    0
    2020-10-14T23:26:35+00:00
    Reply

    .
    cho-f-a-b-ac-dinh-a-b-bt-f-1-3-vs-moi-r

  2. Orla
    0
    2020-10-14T23:26:36+00:00
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    f(x−1)=a(x−1)+b

    =ax−a+b

    ⇒a=−1;−a+b=3

    ⇔b=2

    Vậy (a;b)=(−1;2)

    →a+b=1

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )