Ответ:
а) √(72/121) = √(36 · 2)/11 = 6√2/11.
б) √(48/225) = √(16 · 3)/15 = 4√3/15.
в) √(81/125) = 9/√125 = 9/(5√5) = 9√5/25.
г) √(49/216) = 7/√216 = 7/(6√6) = 7√6/36.
а) √(72/121) = √(36 · 2)/11 = 6√2/11.
б) √(48/225) = √(16 · 3)/15 = 4√3/15.
в) √(81/125) = 9/√125 = 9/(5√5) = 9√5/25.
г) √(49/216) = 7/√216 = 7/(6√6) = 7√6/36.