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log(base4)(x-1) - 2 = log(base4)3

how do i get the value of x?

2007-05-12 08:35:41 · 3 answers · asked by over the air 3 in Science & Mathematics Mathematics

3 answers

write the 2 as 2*log(base4)(4) = log(base4)(16)

So applying law of logs
(x-1) / 16 = 3
x = 49

2007-05-12 08:38:54 · answer #1 · answered by Dr D 7 · 1 0

I'll show you the way I remember these types of problems.

log (base10) 100 = 2
therefore 10² = 100

In your problem rearranging terms we go from
log(base4)(x-1) - 2 = log(base4)3

to
log(base4)(x-1) - log(base4)3 = 2
log(base4)((x-1)/3) = 2

Now using my memory aid from above

4² = (x - 1)/3

x - 1 = 48

x = 49

Hope this helps you.
.

2007-05-12 15:59:11 · answer #2 · answered by Robert L 7 · 0 0

log(base4)(x-1) - 2 = log(base4)3
log(base4)(x-1-log(base4 )16)=log(base4)3
log(base4)(x-1)/16 =log(base4)3
x-1/16=3
x-1=48
x=49.

2007-05-12 15:43:59 · answer #3 · answered by Anonymous · 0 0

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