# Pre-Calc

posted by .

I'm stuck on a pre-calc problem. I need to find y as a function of x, where the constant c is a positive number for In(y-1)+In(y+1)= -x+c

ln[(y-1)(y+1)] = -x+c

change that to exponential form

e^(-x+c) = (y-1)(y+1)
e^(-x+c) = y^2 - 1
y^2 = e^(-x+c) + 1

y = ± sqrt(e^(-x+c) + 1)

## Similar Questions

1. ### Pre Calc

Can someone help me understand how to do this: I need to find two solutions to the problem (x-2)^2 + (y+3)^2 = 9
2. ### pre calc

given x=t^2 and y=t-2 find a relationship between x amd y( express y in terms of x) is the relationship a function
3. ### pre calc

Express the function f(x)=1/(x-2)in the form g of h if h(x)=x-2. Find the function g(x). g(x)=?
4. ### Pre-Calc

I am stuck solving this problem, any help please..Many thanks find all numbers x that satisfy the given equation ln(2x) ------- =2 ln(3x)
5. ### Pre-Calc

Can someone show me how to do this please. I am stuck. find a number x such that e^2x – 12e^x =13
6. ### pre calc

Find the critical number of the function. g(t) = | 6t - 9 | t =