Match the LIST-I with LIST-II
LIST-I LIST-II A. All positive integral powers of a symmetric matrix are I. Unit matrix. B. Positive odd integral powers of a skew-symmetric matrix are II. Null matrix. C. All the matrices which are both symmetric and skew-symmetric, are III. Skew - Symmetric matrix. D. All the square matrices whose each diagonal element is one and each non-diagonal element is equal to zero, are IV. Symmetric matrix.
Choose the correct answer from the options given below:
Match the LIST-I with LIST-II
| LIST-I | LIST-II |
|---|---|
| A. All positive integral powers of a symmetric matrix are | I. Unit matrix. |
| B. Positive odd integral powers of a skew-symmetric matrix are | II. Null matrix. |
| C. All the matrices which are both symmetric and skew-symmetric, are | III. Skew - Symmetric matrix. |
| D. All the square matrices whose each diagonal element is one and each non-diagonal element is equal to zero, are | IV. Symmetric matrix. |
Choose the correct answer from the options given below:
Solution
✅ Correct Option: 3
If then , so powers of a symmetric matrix stay symmetric (IV).
If then , which is skew-symmetric for odd (III).
If is both, then , forcing the null matrix (II).
The described matrix is the identity, or unit matrix (I).
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