问题
解答题
计算下列各式的值 (1)[125
(2)
|
答案
(1)原式=[(53)
+4+(73)2 3
]0.5=(25+4+7)0.5=61 3
(2)原式=
=lg4+lg3 1+
lg0.62+1 2
lg231 3
=lg12 1+lg0.6+lg2
=lg12 1+lg1.2
=lg12 lg10+lg1.2
=1lg12 lg12
计算下列各式的值 (1)[125
(2)
|
(1)原式=[(53)
+4+(73)2 3
]0.5=(25+4+7)0.5=61 3
(2)原式=
=lg4+lg3 1+
lg0.62+1 2
lg231 3
=lg12 1+lg0.6+lg2
=lg12 1+lg1.2
=lg12 lg10+lg1.2
=1lg12 lg12