高数：用描述法表示该集合：不等式4x－5＜3的解集。求学霸～ 不等式4x-5<3的解集.用集合表示
\u4e0d\u7b49\u5f0f4x-5\uff1c3 -5\u79fb\u5230\u53f3\u9879\u53d8\u53f7\u5417 \u4e3a\u5565a08b87d6277f9e2fcea06b831430e924b999f3a0
\u5982\u56fe
{x|x\uff1c2}
\u5206\u6790\uff1a\u5148\u89e3\u4e0d\u7b49\u5f0f\uff0c\u518d\u5229\u7528\u63cf\u8ff0\u6cd5\u8868\u793a\u5176\u89e3\u96c6\u5373\u53ef\u3002
\u89e3\u7b54\uff1a \u89e3\uff1a\u75314x-5\uff1c3\u5f97\uff1ax\uff1c2\uff0c\u7528\u63cf\u8ff0\u6cd5\u8868\u793a\u5176\u89e3\u96c6\u4e3a\uff1a{x|x\uff1c2}\u3002
\u901a\u5e38\u4e0d\u7b49\u5f0f\u4e2d\u7684\u6570\u662f\u5b9e\u6570\uff0c\u5b57\u6bcd\u4e5f\u4ee3\u8868\u5b9e\u6570\uff0c\u4e0d\u7b49\u5f0f\u7684\u4e00\u822c\u5f62\u5f0f\u4e3aF(x\uff0cy\uff0c\u2026\u2026\uff0cz)\u2264G(x\uff0cy\uff0c\u2026\u2026\uff0cz )\uff08\u5176\u4e2d\u4e0d\u7b49\u53f7\u4e5f\u53ef\u4ee5\u4e3a \u4e2d\u67d0\u4e00\u4e2a\uff09\uff0c\u4e24\u8fb9\u7684\u89e3\u6790\u5f0f\u7684\u516c\u5171\u5b9a\u4e49\u57df\u79f0\u4e3a\u4e0d\u7b49\u5f0f\u7684\u5b9a\u4e49\u57df\uff0c\u4e0d\u7b49\u5f0f\u65e2\u53ef\u4ee5\u8868\u8fbe\u4e00\u4e2a\u547d\u9898\uff0c\u4e5f\u53ef\u4ee5\u8868\u793a\u4e00\u4e2a\u95ee\u9898\u3002
\u6269\u5c55\u8d44\u6599\uff1a
\u4e0d\u7b49\u5f0f\u4e24\u8fb9\u76f8\u52a0\u6216\u76f8\u51cf\u540c\u4e00\u4e2a\u6570\u6216\u5f0f\u5b50\uff0c\u4e0d\u7b49\u53f7\u7684\u65b9\u5411\u4e0d\u53d8\u3002\uff08\u79fb\u9879\u8981\u53d8\u53f7\uff09
\u4e0d\u7b49\u5f0f\u4e24\u8fb9\u76f8\u4e58\u6216\u76f8\u9664\u540c\u4e00\u4e2a\u6b63\u6570\uff0c\u4e0d\u7b49\u53f7\u7684\u65b9\u5411\u4e0d\u53d8\u3002\uff08\u76f8\u5f53\u7cfb\u6570\u53161\uff0c\u8fd9\u662f\u5f97\u6b63\u6570\u624d\u80fd\u4f7f\u7528\uff09
\u4e0d\u7b49\u5f0f\u4e24\u8fb9\u4e58\u6216\u9664\u4ee5\u540c\u4e00\u4e2a\u8d1f\u6570\uff0c\u4e0d\u7b49\u53f7\u7684\u65b9\u5411\u6539\u53d8\u3002\uff08\u00f7\u6216\u00d71\u4e2a\u8d1f\u6570\u7684\u65f6\u5019\u8981\u53d8\u53f7\uff09
1\u3001\u4e0d\u7b49\u5f0fF\uff08x\uff09F\uff08x\uff09\u540c\u89e3\u3002
2\u3001\u5982\u679c\u4e0d\u7b49\u5f0fF\uff08x\uff09 < G\uff08x\uff09\u7684\u5b9a\u4e49\u57df\u88ab\u89e3\u6790\u5f0fH\uff08 x \uff09\u7684\u5b9a\u4e49\u57df\u6240\u5305\u542b\uff0c\u90a3\u4e48\u4e0d\u7b49\u5f0f F\uff08x\uff09<G\uff08x\uff09\u4e0e\u4e0d\u7b49\u5f0fF\uff08x\uff09+H\uff08x\uff09<G\uff08x\uff09+H\uff08x\uff09\u540c\u89e3\u3002
3\u3001\u5982\u679c\u4e0d\u7b49\u5f0fF\uff08x\uff090\uff0c\u90a3\u4e48\u4e0d\u7b49\u5f0fF(x)H\uff08x\uff09G\uff08x\uff09\u540c\u89e3\u3002
4\u3001\u4e0d\u7b49\u5f0fF\uff08x\uff09G\uff08x\uff09>0\u4e0e\u4e0d\u7b49\u5f0f\u540c\u89e3\uff1b\u4e0d\u7b49\u5f0fF\uff08x\uff09G\uff08x\uff09<0\u4e0e\u4e0d\u7b49\u5f0f\u540c\u89e3\u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1\u2014\u2014\u4e0d\u7b49\u5f0f
X<2，
绛旓細锝泋|x<2锝
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