# calculus

posted by .

solve the logarithmic equation. Be sure to reject any value of x that is not in the domain.

In square root x+7=1
x= ?

What is the decimal approximation to the solution?
x= ?

• calculus -

so sqrt { x+7} = 1 right?

if so... then square both sides to get x+7 =1
x = -6

• calculus -

I think Knights missed the "ln" in front

ln √(x+7) = 1
√(x+7) = e^1 = e
square both sides
x+7 = e^2

x = e^2 - 7
x = appr .389

## Respond to this Question

 First Name School Subject Your Answer

## Similar Questions

1. ### Logs.

Can you please help me with the following log. problems?
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 - 5) …
3. ### Calculus

Find the functions a) f o g, b) g o f, c) f o f, d) g o g, and their domains. f(x)= square root of x, g(x)= cube root of 1-x These are my answers, but I am not sure about them and I only figured out one domain... that is the part that …
4. ### pre-calculus

solve the following logarithmic equation. Be sure to reject any value of x that is not in thedomain of the orginal logarithmic expression. Give the exact answer. log3(x+8)=4 The three actually drops down a little below the g. Can someone …
5. ### pre-calculus

solve the logarithmic equation. be sure to reject any value of x that is not in the domain of the orginal logarithmic expression. In square root of x+2=2 (If I try to make the square root sign it will not come out right so I wrote …
6. ### pre-calculus

solve the following logarithmic equation. be sure to reject any value of x that is not in the domain of the original logarithmic expression. give the exact answer. then, use the calculator to obtain a decimal appromiation, correct …
7. ### calculus

solve the following logarithmic equation. Be sure to reject any value of x that is not in the domain of orginal expression. then in the solution set round to two decimals places. Inx=8 I get e^8 But am having a hard time with rounding …
8. ### calculus

solve the logarithmic equation. be sure to reject any value of x that is not in the domain of the orginal logarithmic expression. In square root x+7=2 what is the exact solution?
9. ### calculus

solve the logarithmic equation. Be sure to reject any value of x that is not in the domain of the orginal logarithmic expression. In square root x+7=1 I get this far and then get stuck, can you help me?
10. ### Algebra

Solve the logarithmic equation. Be sure to reject any value of x that is not in the domain of the original logarithmic expression. ln ã(x+4)=1 What is the exact solution?

More Similar Questions