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Maths-

General

Easy

Question

If A is square matrix such that A² = A, then |A| equals-

0 or 1
–2 or 2
–3 or 3
None of these

The correct answer is: 0 or 1

A² = A
|A²| = |A|
|A|² = |A|
|A|² – |A| = 0
|A| [|A| –1] = 0 $rightwards double arrow$ |A| = 0 or |A| = 1

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II) $straight P subscript 4 not stretchy rightwards arrow with straight capital delta on top PH subscript 3 plus HPO subscript 2 superscript ⊖$
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chemistry-General

Which is not true for ozone?

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chemistry-General

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