one more log question: log x + log 5 = 1?

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2006-12-17 11:35:40 · 4 answers · asked by celticevening 1 in Science & Mathematics ➔ Mathematics

well, log A + log B = log AB, so...

log 5X = 1

5X = 10^1
X = 2

2006-12-17 11:37:13 · answer #1 · answered by TankAnswer 4 · 0⤊ 0⤋

Assuming the logs are to the base 10.
This can be rewritten as x * 5 = 10
so x = 2

2006-12-17 11:39:16 · answer #2 · answered by Stewart H 4 · 0⤊ 0⤋

log x + log 5 = log 5x

log 5x = 1
10^1 = 5x
10 = 5x
2 = x

Hope that helps! Remember that log actually means log base 10!

2006-12-17 11:39:17 · answer #3 · answered by laffytaffychick13 1 · 0⤊ 0⤋

log x + log 5 = 1
log 5x=1
5x=10
x=2

2006-12-17 11:37:48 · answer #4 · answered by yupchagee 7 · 0⤊ 0⤋