下列说法中不正确的个数是 （ ）①命题“ x∈R， ≤0”的否定是“ ∈R，...
\u4ee5\u4e0b\u6b63\u786e\u547d\u9898\u7684\u4e2a\u6570\u4e3a\uff08\u3000\u3000\uff09\u2460\u547d\u9898\u201c\u5b58\u5728 x 0 \u2208R\uff0c 2 x 0 \u22640 \u201d\u7684\u5426\u5b9a\u662f\uff1a\u201c\u4e0d\u5b58\u5728 x\u2460\u547d\u9898\u201c\u5b58\u5728 x 0 \u2208R\uff0c 2 x 0 \u22640 \u201d\u7684\u5426\u5b9a\u662f\uff1a\u201c\u4e0d\u5b58\u5728 x 0 \u2208R\uff0c 2 x 0 \uff1e0 \u201d\uff0c\u4e0d\u6b63\u786e\uff0c\u56e0\u4e3a\u7279\u79f0\u547d\u9898\u7684\u5426\u5b9a\u662f\u5168\u79f0\u547d\u9898\uff1b\u2461\u51fd\u6570 f(x)= x 1 3 -( 1 4 ) x \u7684\u96f6\u70b9\u5728\u533a\u95f4 ( 1 4 \uff0c 1 3 ) \u5185\uff0c\u56e0\u4e3a f( 1 3 )f( 1 4 )\uff1c0 \uff0c\u6240\u4ee5\u6b63\u786e\uff1b\u2462\u67d0\u73ed\u7537\u751f20\u4eba\uff0c\u5973\u751f30\u4eba\uff0c\u4ece\u4e2d\u62bd\u53d610\u4e2a\u4eba\u7684\u6837\u672c\uff0c\u6070\u597d\u62bd\u52304\u4e2a\u7537\u751f\u30016\u4e2a\u5973\u751f\uff0c\u5219\u8be5\u62bd\u6837\u4e2d\u5973\u751f\u88ab\u62bd\u5230\u7684\u6982\u7387\u5927\u4e8e\u7537\u751f\u88ab\u62bd\u5230\u7684\u6982\u7387\uff0c\u4e0d\u6b63\u786e\uff0c\u56e0\u4e3a\u5973\u751f\u88ab\u62bd\u5230\u7684\u6982\u7387\u4e3a\uff1a 6 30 = 1 5 \uff0c\u7537\u751f\u662f 4 20 = 1 5 \uff1b\u2463\u56e0\u4e3a\uff1a (1- x ) 8 \u5c55\u5f00\u5f0f\u4e2d\uff0c\u4ee4x=1\u5f97\u5c55\u5f00\u5f0f\u7684\u5404\u9879\u7cfb\u6570\u548c\u4e3a0 (1- x ) 8 \u5c55\u5f00\u5f0f\u542bx 4 \u9879\u7684\u7cfb\u6570\u4e3aC 8 8 \uff08-1\uff09 8 =1\uff0c\u6545\u5c55\u5f00\u5f0f\u4e2d\u4e0d\u542bx 4 \u9879\u7684\u7cfb\u6570\u7684\u548c\u4e3a0-1=-1 (1- x ) 8 \u5c55\u5f00\u5f0f\u4e2d\u4e0d\u542bx 4 \u9879\u7684\u7cfb\u6570\u7684\u548c\u4e3a1\uff0c\u4e0d\u6b63\u786e\uff0e\u6545\u9009A\uff0e
\u2460\u7b26\u5408\u547d\u9898\u5426\u5b9a\u7684\u5b9a\u4e49\u2461\u547d\u9898p\u2227q\u4e3a\u771f\u5219p\uff0cq\u90fd\u4e3a\u771f\uff0c\u800c\u547d\u9898p\u2228q\u4e3a\u771f\u4e3a\u4e00\u4e2a\u4e3a\u771f\u6216\u4e24\u4e2a\u90fd\u4e3a\u771f\u2462m=0\u65f6\u4e0d\u6210\u7acb\u2463\u6982\u7387\u5e94\u4e3a1-\u03c04\u6545\u7b54\u6848\u662f2
| B 扩展阅读：苹果手机自动答题软件 ... 查答案神器 ... 免费拍照答题一秒出答案 ... 可以扫题目出答案的软件 ... 万能答题软件扫一扫 ... 文言文翻译转换器 ... 看图写话扫一扫图 ... 手串颗数对照表 ... 夏日必备清凉好物 ... 本站交流只代表网友个人观点，与本站立场无关 |
