题目内容
求下列各式中x的值:
(1)log3(
)=1;
(2)log2003(x2-1)=0.
(1)log3(
1-2x |
9 |
(2)log2003(x2-1)=0.
解 (1)∵log3(
)=1,
∴
=3,
∴1-2x=27,即x=-13.
(2)∵log2003(x2-1)=0,
∴x2-1=1,即x2=2,
∴x=±
.
1-2x |
9 |
∴
1-2x |
9 |
∴1-2x=27,即x=-13.
(2)∵log2003(x2-1)=0,
∴x2-1=1,即x2=2,
∴x=±
2 |
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