00:01
So we're using f of x to equal the square root of x, and we want to find f of x minus f of four divided by x minus four for a few different values.
00:14
We want x to be equal to 5, 4 .5, and 4 .1.
00:22
So we can see for, i'll call this one a, this one b, and this one c.
00:26
So for a, we're going to have the square root of five minus, if we plug four into there, we get two.
00:36
And then in the denominator, we're going to have five minus four, which is one.
00:40
So as a three -placed decimal, we have the square root of five.
00:45
It helps if i turn my calculator on, square root of five minus two and then divided by one.
00:51
And three -plice decimal gives me 2 .236.
00:55
If i do that for 4 .5, i'm going to have the square root of 4 .5 minus 2 divided by, and i'm going to have 4 .5 minus 4.
01:10
And so we're going to have the square root...