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kankanqa一星新手會員
2010-10-26 23:45#1
1. log2 (x-15) = 3+ log2 (x-1)
2. If log3 (2x+a) = 2, find x in terms of a.
3. Transform the following model to linear form:
y=(a^m)(b^x)
Given that x is the horizontal axis, explain what graph you will plot and what the slope and y-intercept are.
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壺一v一版主
2010-10-28 18:30#2
唔係好睇得明你打咩
可能應該
log轉ln 之後take多個e比佢
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NaozumiVIP會員
2010-10-28 20:30#3
log2 (x-15) = 3+ log2 (x-1)
log2 (x - 15) - log2 (x-1) = 3
log2 [(x - 15)/(x - 1)] = 3
(x - 15)/(x - 1) = 8
剩番果d手尾應該冇問題啦
log3 (2x+a) = 2
2x + a = 9
剩番果d手尾應該冇問題啦
y=(a^m)(b^x)
log y = log [(a^m)(b^x)]
log y = log a^m + log b^x
log y = m log a + x (log b)