# Math

Can someone tell me this is right?

Look for the domain.

f(x)=log(sub3)(5x+1)
5x+1<=0
(5x/5)<=(-1/5)
x<=(-1/5)
x>(-1/5)
(-1/5,oo) -domain

1. 👍 0
2. 👎 0
3. 👁 85
1. yes, x > -1/5

1. 👍 0
2. 👎 0
posted by Reiny
2. Thank-you!

1. 👍 0
2. 👎 0
3. actually your second line should have said

5x+1 > 0

1. 👍 0
2. 👎 0
posted by Reiny
4. Do I need to change it in each line after the second line?

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Algebra

I am looking for the domain. f(x)=log(sub3)(5x+1) 5x+1

asked by Anne on April 9, 2008
2. ### algebra homework

please check my answers. Solve the logarithmic equation. Be sure to reject any value that is not in the domain of the original logarithmic expressions. Give the exact answer. ln sqrt x+6 = 9 i got {e^9-6} log (x + 4) = log (5x -

asked by Ang on October 26, 2007
3. ### math

Logarithm!!! Select all of the following that are true statements: (a) log(2x) = log(2) + log(x) (b) log(3x) = 3 log(x) (c) log(12y) = 2 log(2) + log(3y) (d) log(5y) = log(20y) – log(4) (e) log(x) = log(5x) – log(5) (f) ln(25)

asked by Simon on April 16, 2010
4. ### pre-calculus

I posted a problem earlier and made a mistake the question is what is the domain and range of f(x)= log subscript 3 (1-x)? Sorry! The answer is the same. The domain and range will be the same as if it were log base 40.

asked by emma on January 13, 2007
5. ### Math

Find the domain of definition of function f(x) given by f(x)= log base4{log base5(log base3(18x - x^2 - 77)}

asked by Shahswat on September 27, 2016
6. ### Mathematics

Prove that log a, log ar, log ar^2 is an a.p. Is the following below correct? Log ar^2 - Log ar= Log ar - Log a hence applying laws of logarithm Log(ar^2/ar) = log(ar/a) Log and log cancels out and then cross-multiply hence a^2r^2

asked by Anonymous on July 15, 2009
7. ### domain

How do you find the domain of log(x^2-4)? and how about this one? e^(3x+4)? Please help me! Well kristie, you might recognize log(x^2-4) = log((x-2)(x+2)) and then use a property of logs to see it as a sum, i.e.,

asked by kristie on July 17, 2006
8. ### Algebra 2

solve for x: 3^2x+3=7^x+1 I did 2x+3=log0f3(7)+ logof3(7) (2-log of 3(7))x=log of 3(7)-3 x=log of 3 (7)+log of 3 (3^-3)/log 0f 3 (3^2)-log of 3 (7) x=log of 3 (7-1/3^3)/log of 3(9/7) log of 3(7/27)/log of 3(9/7) answer log of

asked by sara on March 3, 2019
9. ### pre-calculus

What is the domain and range of log3 (1-x)? I will be happy to critique your thinking. To assist you, consider log (-4) log (0) log 25 Those are to the base 10, changing to another base just changes the numbers, not the function.

asked by emma on January 13, 2007
10. ### math

write as a single logarithm: -2logbase3(1/x)+(1/3)logbase3(square root of x) please show the steps to solving this. thanx. remember that 1 log (AxB) = log A + Log B (same base) 2 log (A/B) = log A - log B 3 log A^n = n log A use

asked by michelle on February 25, 2007

More Similar Questions