Chapter 11.3, Problem 61E

To determine

(a)

To find:

The inverse of the matrix $\left[\begin{array}{ccc}3& 1& 3\\ 4& 2& 4\\ 3& 2& 4\end{array}\right]$.

To determine

(b)

To find:

The ounces of each food the nutritionist should feed his laboratory rats in order to keep their daily diet to contain $10\text{mg}$ of folic acid, $14\text{mg}$ of choline, and $13\text{mg}$ of inositol.

To determine

(c)

To find:

The ounces of each food the needed to supply $9\text{mg}$ of folic acid, $12\text{mg}$ of choline, and $10\text{mg}$ of inositol.

To determine

(d)

To find:

The combination of food that can supply $2\text{mg}$ of folic acid, $4\text{mg}$ of choline, and $11\text{mg}$ of inositol.