a + log a = 10
b + 10^b = 10
求a+b
log方程問題
2011-01-15 3:04 am
回答 (3)
2011-01-15 7:14 am
2011-01-15 6:23 am
We can find answer range from equations,
a values at 9<10
Reason:
log a increases slowly, the main factor of the whole value is a.
b values at 0<1
Reason:
b increases slowly relatively to 10^b, the main factor of the whole value is 10^b.
From the above approximation,
9 < a + b < 11
2011-01-14 22:23:41 補充：
a values between 10 and 9,
b values between 0 and 1
a values at 9<10
Reason:
log a increases slowly, the main factor of the whole value is a.
b values at 0<1
Reason:
b increases slowly relatively to 10^b, the main factor of the whole value is 10^b.
From the above approximation,
9 < a + b < 11
2011-01-14 22:23:41 補充：
a values between 10 and 9,
b values between 0 and 1
2011-01-15 4:55 am
a + b = 10
a + b = 10
a + b = 10
收錄日期: 2021-04-23 23:22:09
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110114000051KK01023