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CBSE Class 12 · 2015 · MatricesVery Short Answer

Write the element

a_{23}

of a

3 \times 3

matrix

A = (a_{ij})

whose elements

a_{ij}

are given by

a_{ij} = \frac{∣ i - j ∣}{2}

.

Answer: $a_{23} = \frac{1}{2}$

Solution

Substitute

i = 2, j = 3

into the rule.

a_{23} = \frac{∣2 - 3∣}{2} = \frac{1}{2} .

a_{23} = \frac{1}{2}

CBSE Class 12 Board · 2015 · Subjective

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