00:01
Let's determine the inverse of this function.
00:04
So here we have the function, if of x equals a square root of a x plus b, x is greater than or equal 0 and a and b are two positive real numbers.
00:15
And so to determine the inverse of the function, we follow a few steps.
00:19
In step one, we replace f of x by y.
00:26
So i'm going to replace f of x by y.
00:29
And so the equation now becomes y equals square root of, a x plus b in step two we interchange x and y that is x will be replaced as y and y and y will be replaced as x so from the equation y equals square root of a x plus b replace all y by x and replace all x by y and so therefore this equation now becomes x equals square root of a x plus b.
01:09
In step three, we solve for y, solve y.
01:19
So let's consider this equation.
01:21
X equals square root of a y plus p.
01:27
To solve for y, let's square both side.
01:29
So we squared this side.
01:31
We also square this side.
01:33
Square of x is x squared.
01:36
Then we have a square root and we squared up...