题目内容
(1)计算:0.25×(-
)-4-4÷(
-1)0-(
)-
;
(2)计算:(
)-
+100(
lg9-lg2)+ln
+(log98)•(log4
).
1 |
2 |
5 |
1 |
16 |
1 |
2 |
(2)计算:(
16 |
9 |
1 |
2 |
1 |
2 |
4 | e3 |
3 | 3 |
分析:(1)利用指数幂的运算性质即可算出;
(2)利用指数幂和对数的运算性质即可算出.
(2)利用指数幂和对数的运算性质即可算出.
解答:解:(1)原式=2-2×(2-1)-4-4÷1-(2-4)-
=2-2+4-4-22=4-4-4=-4;
(2)原式=[(
)-2]-
+102(
lg32-lg2)+lne
+
×
=
+10lg(
)2+
+
×
=
+
+
+
=
=4.
1 |
2 |
(2)原式=[(
3 |
4 |
1 |
2 |
1 |
2 |
3 |
4 |
lg8 |
lg9 |
lg3
| ||
lg4 |
3 |
4 |
3 |
2 |
3 |
4 |
3lg2 |
2lg3 |
| ||
2lg2 |
3 |
4 |
9 |
4 |
3 |
4 |
1 |
4 |
16 |
4 |
点评:熟练掌握指数幂和对数的运算性质是解题的关键.
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