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How would I solve this LOG problem (different bases) 10 points?
log(base 2)(2x+1) - log(base 4)x = log(base 2)3
please explain with steps
thanks
2 Answers
- 1 decade agoFavorite Answer
log(base 2)(2x+1) - log(base 4)x = log(base 2)3
Add: log(base 4)x; to both sides
subtract: log(base 2)3; to both sides
you're left with: log(base 2)(2x+1) - log(base 2)3= log(base 4)x
using properties of logarithms you take the left hand side of the equation and you divide both quotients like so:
log(base2)(2x+1/3).
Now, we want to get everything into base 2 so that we can simplify. Look at the right hand of the equation, you have base 4. 4 is equal to 2^2 or which is the same as log(base2^2)x.
We're left with this:
log(base2)(2x+1/3).=log(base2)2x
we simplify log(base2) on both sides and we have: (2x+1)/3=2x........2x+1=6x........1=4x......x=1/4.
Substitute x=1/4 into your original equation and you'll see it works out!
Good luck!
Source(s): I'm good with numbers. - MechEng2030Lv 71 decade ago
log(base 2)(2x + 1) - log(base 2)(âx) = log(base 2) 3
log(base 2)[(2x + 1)/(âx)] = log(base 2) 3
(2x + 1) = 3âx
Solve for x.