LU Decomposition

Question

Find the value of a+b where a is for numerator and b is for denominator of l₃₂ in the matrix A 

i am getting l32 as 32/(-51) plz confirm

Comments

can someone explain the question?what is a ,b and how you got the answer?

---

Here no need to solve total LU decomposition

Only $l_{32}$ value is required

that $l_{32}=\frac{-32}{51}$

Others values which we are getting $u_{11}=5,u_{12}=8,u_{13}=13,u_{22}=\frac{-51}{5},u_{23}=\frac{-76}{5},u_{33}=\frac{26}{25}$

$l_{21}=\frac{7}{5},l_{31}=\frac{1}{5}$

Answer 1

I am also getting the same answer. :)

Comments

okkkk

---

What is I32?