Need help with this study review guide ASAP please! If possible could this be done on paper. Much easier to understand. Thank you! Calculate ${\displaystyle \underset{i=1}{\overset{4}{}}}{i}^2$

Calculate ${\displaystyle \underset{i=0}{\overset{3}{}}}(i+1)$

Calculate ${\displaystyle \underset{n=0}{\overset{5}{}}}{3}^n$

Let $x_1=10,x_2=10,x_3=4.$ Suppose that ${\displaystyle \underset{i=1}{\overset{3}{}}}{x}_i=48.$ Solve for $.$

Factorial:

Calculate $3!$

Simplify $\frac{7!}{5!}$

Simplify $\frac{n!}{(n-2)!}$

Calculate ${\displaystyle \underset{x=1}{\overset{2}{}}}x!$

Extra Credit Question:

Calculate ${\displaystyle \underset{k=1}{\overset{4}{}}}\frac{k!}{k+1}$