00:01
So we're given the function 8 over the square root of x minus 2.
00:07
And i would actually rewrite this as 8 and then x minus 2.
00:12
When you're in the denominator, it's a negative power, and then the square root is the 1 half.
00:18
So now what i can just do is the chain rule.
00:23
And what's the chain rule is i take the derivative of the out function first.
00:29
So negative 1⁄2 times 8, which would be negative 4.
00:32
And i subtract 1 from that exponent and negative 1 half minus 1 is negative 3 halves.
00:37
I leave the inner piece alone and then i multiply by the derivative of the inside.
00:43
Well, the derivative of x minus 1 is just, sorry, x minus 2, its derivative is 1...