Algebra and Geometey

posted by Katherine

Hi can someone explain what is meant by the inverse of a transformation

  1. Steve

    it is the transformation needed to return to the original state.

    Just as an inverse function is what you need to get x.

    sqrt(x) and x^2 are inverses because (sqrt(x))^2 = sqrt(x^2) = x

    similarly, stretch by 2 and shift 8 up has the inverse transformation

    shift down 8 and shrink by 2.

    + is the inverse of -
    and so on.

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