00:01
In this question we are given this curve here, we want to find the arc length of this curve over this interval 03.
00:10
Now for arc length, our point s is defined to be in general over the interval ab, over the x interval ab, square root of 1 plus d .y over the x x squared square.
00:34
So we want to integrate this part here over ab.
00:40
In the x interval.
00:43
So it looks like we need to do the differentiation.
00:47
Now, two -thirds multiplied to the function.
00:51
So two -third remains.
00:53
Now, bring down the power 3 over 2.
00:57
Repeat whatever is in the bracket.
00:59
Subtract one to the power, so we get half.
01:02
Now, differentiate inside the bracket.
01:05
X square where differentiates, bring down the power to, repeat the x and subtract one to the power.
01:09
So there'll be 1.
01:11
Plus 1 is a constant when differentiate gets 0.
01:17
Now you can see that this cancels.
01:21
The 2x can be brought out in front.
01:24
And this is power half means square root...