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Let M be a 3xx3 matrix satisfying M[[0]...

Let `M` be a `3xx3` matrix satisfying
`M[[0], [1], [0]]=M[[1], [-1], [0]]=[[1], [1], [-1]]`, and `M[[1], [1], [1]]=[[0], [0], [12]]`
Then the sum of the diagonal entries of `M` is _________.

A

(a) `7`

B

(b) `18`

C

(c) `9`

D

(d) `6`

Text Solution

Verified by Experts

The correct Answer is:
c
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