#### (i)

(ii) [2 3 – 7]

(iii)

(iv)

(v)

(vi)

**Solution:**

#### (i) If a matrix has 4 elements, what are the possible order it can have?

(ii) If a matrix has 8 elements, what are the possible order it can have?

**Solution:**

**More Solutions:**

- If a : b : : c : d, prove that.
- If (5x+7y)/(5u+7v) = (5x-7y)/(5u-7v), show that (x/y) = (u/v).
- If (pa + qb) : (pc + qd) :: (pa – qb) : (pc – qd) prove that a : b : : c : d
- If (11a² + 13b²) (11c² – 13d²) = (11a² – 13b²)(11c² + 13d²), prove that a : b :: c : d.
- If x = (2ab/a+b), find the value of (x+a/x-a) = (x+b/x-b).