题目内容
(1)计算(
)-
×(-π)0+8
×
+(
×
)6-
(2)已知log189=a,18b=5,求log365.
3 |
2 |
1 |
3 |
1 |
4 |
4 | 2 |
3 | 2 |
3 |
(
|
(2)已知log189=a,18b=5,求log365.
(1)(
)-
×(-π)0+8
×
+(
×
)6-
=(
)
+2
×2
+22×33-(
)
=2+4×27
=110.
(2)∵log189=a,
∴a=log18
=1-log182,
又∵18b=5,
∴b=log185,
∴log365=
=
=
.
3 |
2 |
1 |
3 |
1 |
4 |
4 | 2 |
3 | 2 |
3 |
(
|
=(
2 |
3 |
1 |
3 |
3 |
4 |
1 |
4 |
2 |
3 |
1 |
3 |
=2+4×27
=110.
(2)∵log189=a,
∴a=log18
18 |
2 |
又∵18b=5,
∴b=log185,
∴log365=
log185 |
log1836 |
log185 |
1+log182 |
b |
2-a |

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