00:01
Here, we're given the equation of f of x piecewise, and we're asked to find a and b to make this function continuous for all values.
00:12
First notice, this is continuous for almost all values.
00:16
The only exceptions are where it changes equations, and that's because these are all polynomials.
00:21
So let's just make sure that at each of these points where it changes, the functions on the left and right are equal.
00:27
So that would be at x equals 1 and 3.
00:31
We need to make left and right equal.
00:33
So let's start off by looking at 1.
00:35
On the left, we have 1 plus x.
00:38
But x is 1.
00:39
So really, we have 2.
00:41
And that needs to equal what happens on the right, which is x minus a with x equal to 1.
00:46
So that's 1 minus a.
00:48
Well, that's fairly simple.
00:49
Let's subtract a or add a and subtract 2...