题目内容
(1)计算
×
×
(2)若xlog34=1,求4x+4-x的值.
| 3 |
| 3 | 1.5 |
| 6 | 12 |
(2)若xlog34=1,求4x+4-x的值.
(1)原式=
=
=3.
(2)由xlog34=1,得x=log43,
∴4x=3,4-x=
,
∴4x+4-x=3+
=
.
| 6 | 33×(
| ||
| 6 | 36 |
(2)由xlog34=1,得x=log43,
∴4x=3,4-x=
| 1 |
| 3 |
∴4x+4-x=3+
| 1 |
| 3 |
| 10 |
| 3 |
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