SOLUTION: find the inverse of y=log(-3x)-4

Question 950206: find the inverse of y=log(-3x)-4

Found 2 solutions by MathLover1, stanbon:
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

To find an inverse of a function, exchange the 's and 's in the original function and then re-solve for .
Recall that is equivalent to stating that for any base .

so,inverse is:
.........exchange the and

.....if log same, then

...-> the inverse

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
find the inverse of y=log(-3x)-4
----------
1st: Interchange x and y to get:
x = log(-3y)-4
----
2nd: Solve for "y"::
log(-3y) = x+4
-----
-3y = 10^(x+4)
----
y = (-1/3)*10^(x+4)
That is the inverse.
Cheers,
Stan H.
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