问题
解答题
(1)已知A={x|
(2)求log2.56.25+lg
|
答案
(1)∵A={x|
<2x<4}={x|-1<x<2},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
+ln1 100
+21+log23e
=2-2+
+2×31 2
=
.13 2
(1)已知A={x|
(2)求log2.56.25+lg
|
(1)∵A={x|
<2x<4}={x|-1<x<2},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
+ln1 100
+21+log23e
=2-2+
+2×31 2
=
.13 2