Answer:
The solution is given as 
Step-by-step explanation:
It is given that
![\lim_{\Delta \to 0} \sum_{k=1}^{n}(x_{k}^{*})^4\Delta x_{k} \, \,\,\,\,\,\,\,\,\, [6, 10]](https://tex.z-dn.net/?f=%5Clim_%7B%5CDelta%20%5Cto%200%7D%20%5Csum_%7Bk%3D1%7D%5E%7Bn%7D%28x_%7Bk%7D%5E%7B%2A%7D%29%5E4%5CDelta%20x_%7Bk%7D%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%5C%2C%20%5C%2C%5C%2C%5C%2C%5C%2C%5C%2C%5C%2C%5C%2C%5C%2C%5C%2C%20%5B6%2C%2010%5D)
As
where a and b are the lower and upper limits of the bound respectively.
On comparison it is observed that
So the equation is given as

So the solution is given as 
I think so because I did this this year but I’m not sure
Answer: 40
Step-by-step explanation: The pattern goes by 8's