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Ab cd. Mo on am DN ab CD BMO CNO. Дано: mo=on,am=DN,ab=CD,. Дано mo+on am=DN. Дано mo on am DN ab CD BMO CNO доказать ABM DCN.
Mo on am DN ab CD BMO CNO. Дано: mo=on,am=DN,ab=CD,. Дано mo+on am=DN. Дано mo on am DN ab CD BMO CNO доказать ABM DCN.

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