find the value of g-¹(-2) if g (x) =4-2x​

Question

find the value of g-¹(-2) if g (x) =4-2x​

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Nguyệt Ánh 4 years 2021-07-21T07:39:53+00:00 1 Answers 12 views 0

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  1. giabao
    0
    2021-07-21T07:41:06+00:00
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    Answer:

    Solution given:

    g-¹(-2)=?

    we have

    g(x)=4-2x

    let

    g(x)=y

    y=4-2x

    Interchanging role of x and y

    x=4-2y

    2y=4-x

    dividing both side by 2

    2y/2=(4-x)/2

    y=(4-x)/2

    f-¹(x)=(4-x)/2

    now

    Substitute value -2 in place of x

    f-¹(-2)=(4-(-2))/2=(4+2)/2=6/2=3

    the value of g-¹(-2) is 3.

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