# NCERT Class 12-Mathematics: Exemplar Chapter –4 Determinants Part 6

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**Question 6:**

**Answer:**

We have,

Expanding along

Using the properties of determinants in Exercises 7 to 9, prove that:

**Question 7:**

**Answer:**

We have to prove,

Hence proved.

**Question 8:**

**Answer:**

We have to prove,

Hence proved.