题目内容
化简:(1)(2)
(
-
);
(3)log2(1+
+
)+log2(1+
-
).
解析:(1)原式=
=
=
.
(2)原式=
[
-
]
=
(2+
-2+
)
=
2
=3.
(3)原式=log2[(1+
)2-3]
=log2(3+2
-3)
=
=
=
.
练习册系列答案
相关题目
题目内容
化简:(1)(2)
(
-
);
(3)log2(1+
+
)+log2(1+
-
).
解析:(1)原式=
=
=
.
(2)原式=
[
-
]
=
(2+
-2+
)
=
2
=3.
(3)原式=log2[(1+
)2-3]
=log2(3+2
-3)
=
=
=
.