17题,17题,
17题,整数:-√49,√25,3√27,|3√-1|分数:22/7正实数:√5,22/7,√25,3√27,3+√29负实数:-√49,|3√-1|,-π/2有理数:22/7,-√49,√25,3√27,|3√-1|无理数:√5,-π/2,3+√29