:

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    . f(x) [a, b], x1 x2, a? x1 < x2 ?b, f(x1) < f(x2), , f(x1) ? f(x2). .


    (Banzare Coast)
    ------ 5 1995 ------ ------ I . ------ 1. ------ 1.
    -
    (Abril) ( . 1959)
    :