SOLUTION: Hello, How would I do the following: 1. Express as a single logarithm and if possible, simplify. {{{Loga x^3-2 loga sqrt^3 x}}} 2. Choose the expression or equation

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: Hello, How would I do the following: 1. Express as a single logarithm and if possible, simplify. {{{Loga x^3-2 loga sqrt^3 x}}} 2. Choose the expression or equation       Log On


   



Question 250331: Hello,
How would I do the following:
1. Express as a single logarithm and if possible, simplify.
Loga+++x%5E3-2++loga+sqrt%5E3+x
2. Choose the expression or equation that is equivalent to the one given
Logx 29=5
a. 29^x=5
b. X^29=5
c. 5^x=29
d. X^5=29
My answer is "d" is that right?
3. Express as a sum, difference, and product of logarithms, without using exponents. Log2+x%5E5+y%5E8%2F4
I am really lost, this is part of a test, and I can to figure them out, can you please help me.

Answer by drk(1908) About Me  (Show Source):
You can put this solution on YOUR website!
Let's take this part by part:
1. Express as a single logarithm and if possible, simplify.
Log_a%28x%5E3%29+-+2log_a%28sqrt%283x%29%29
Step 1 - use the power rule and bring the 2 up to the exponent:
Log_a%28x%5E3%29+-+%28log_a%28sqrt%283x%29%29%5E2%29
step 2 - rewrite the square root a 1/2 power and cancel with the 2.
Log_a%28x%5E3%29+-+log_a%283x%29
step 3 - since the bases are the same and we are subtracting, we can combine and make this division as
Log_a%28x%5E3%2F3x%29
step 4 - we can reduce by x; assuming x is not 0 as
Log_a%28x%5E2%2F3%29
--
2. Choose the expression or equation that is equivalent to the one given
Log_x(29) = 5
a. 29^x=5
b. X^29=5
c. 5^x=29
d. X^5=29
My answer is "d" is that right?
[D] is correct.
--
3. Express as a sum, difference, and product of logarithms, without using exponents:
%28Log%282x%29%5E%285y%5E8%29%29/4
step 1 - since 5y^8 is the big exponent, that comes out front using power rule
%28%285y%5E8%29%2Alog%282x%29%29%2F4
step 2 - since we are multiplying 2 and x, we can split it using addition as
%28%285y%5E8%29%2F4%29%2A%28log%282%29+%2B+log%28a%29%29