00:01
Okay, so this problem gives us f of x is equal to square root of x minus 3.
00:09
And we have g of x is equal to 2x cube minus 54.
00:21
Okay, so it says h of x is equal to the sum of f and g of x.
00:34
First it wants to know the domain.
00:36
So the domain equals the intersection of the domains of f and g.
00:41
So for g, the domain is all real numbers.
00:45
And for f, it's all real numbers except because of the square root.
00:50
X has to be greater than or equal to three.
00:55
So the intersection of those two, that would put our domain starting at three and going to infinity.
01:05
Okay, so that's part a.
01:07
Part b wants a new function rule for h.
01:11
So we just have to add the two...