深化理解对非负实数X“四舍五入”到个位的值记为〈x〉既当n为非负整数时,如果n-1/2≤x∠n+1/2,则〈x〉=n.如〈0〉=〈0.48〉=0,〈0.64〉=〈1.493〉=1,〈2〉=2,〈3.5〉=〈4.12〉=4,...试解决下列问题:⑴填
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![深化理解对非负实数X“四舍五入”到个位的值记为〈x〉既当n为非负整数时,如果n-1/2≤x∠n+1/2,则〈x〉=n.如〈0〉=〈0.48〉=0,〈0.64〉=〈1.493〉=1,〈2〉=2,〈3.5〉=〈4.12〉=4,...试解决下列问题:⑴填](/uploads/image/z/2628166-22-6.jpg?t=%E6%B7%B1%E5%8C%96%E7%90%86%E8%A7%A3%E5%AF%B9%E9%9D%9E%E8%B4%9F%E5%AE%9E%E6%95%B0X%E2%80%9C%E5%9B%9B%E8%88%8D%E4%BA%94%E5%85%A5%E2%80%9D%E5%88%B0%E4%B8%AA%E4%BD%8D%E7%9A%84%E5%80%BC%E8%AE%B0%E4%B8%BA%E3%80%88x%E3%80%89%E6%97%A2%E5%BD%93n%E4%B8%BA%E9%9D%9E%E8%B4%9F%E6%95%B4%E6%95%B0%E6%97%B6%2C%E5%A6%82%E6%9E%9Cn-1%2F2%E2%89%A4x%E2%88%A0n%2B1%2F2%2C%E5%88%99%E3%80%88x%E3%80%89%3Dn.%E5%A6%82%E3%80%880%E3%80%89%3D%E3%80%880.48%E3%80%89%3D0%2C%E3%80%880.64%E3%80%89%3D%E3%80%881.493%E3%80%89%3D1%2C%E3%80%882%E3%80%89%3D2%2C%E3%80%883.5%E3%80%89%3D%E3%80%884.12%E3%80%89%3D4%2C...%E8%AF%95%E8%A7%A3%E5%86%B3%E4%B8%8B%E5%88%97%E9%97%AE%E9%A2%98%3A%E2%91%B4%E5%A1%AB)
深化理解对非负实数X“四舍五入”到个位的值记为〈x〉既当n为非负整数时,如果n-1/2≤x∠n+1/2,则〈x〉=n.如〈0〉=〈0.48〉=0,〈0.64〉=〈1.493〉=1,〈2〉=2,〈3.5〉=〈4.12〉=4,...试解决下列问题:⑴填
深化理解对非负实数X“四舍五入”到个位的值记为〈x〉
既当n为非负整数时,如果n-1/2≤x∠n+1/2,
则〈x〉=n.
如〈0〉=〈0.48〉=0,〈0.64〉=〈1.493〉=1,〈2〉=2,〈3.5〉=〈4.12〉=4,...
试解决下列问题:
⑴填空:〈x〉=__(π为圆周率);
⑵如果〈2x-1〉=3,求实数x的取值范围.
深化理解对非负实数X“四舍五入”到个位的值记为〈x〉既当n为非负整数时,如果n-1/2≤x∠n+1/2,则〈x〉=n.如〈0〉=〈0.48〉=0,〈0.64〉=〈1.493〉=1,〈2〉=2,〈3.5〉=〈4.12〉=4,...试解决下列问题:⑴填
7/4<=X>9/4