题目内容
(1)已知A={x|
<2x<4},B={x|x-1>0},求A∩B和A∪B;
(2)求log2.56.25+lg
+ln
+21+log23的值.
1 |
2 |
(2)求log2.56.25+lg
1 |
100 |
e |
(1)∵A={x|
<2x<4}={x|-1<x<2},
B={x|x-1>0}={x|x>1},
∴A∩B={x|1<x<2},A∪B={x|x>-1}.
(2)log2.56.25+lg
+ln
+21+log23
=2-2+
+2×3
=
.
1 |
2 |
B={x|x-1>0}={x|x>1},
∴A∩B={x|1<x<2},A∪B={x|x>-1}.
(2)log2.56.25+lg
1 |
100 |
e |
=2-2+
1 |
2 |
=
13 |
2 |
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