TS ICET 23 May 2019 Shift 1 Paper

Question : 133 of 200

Marks: +1, -0

If A and B are 3 × 3 matrices, such that the sum of elements along principal diagonal of A is 3 and the sum of elements along principal diagonal of B is 4, then the sum of principal diagonal elements of 3A + 5 B=

Validate

Solution:

Required answer

= 3 × 3 + 5 × 4 = 29.

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