13. If A = [1 2 ]
[3 4 ]
then find the value of |2A|
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I don't understand your question
Step-by-step explanation:
indicator are those substance which changes its colour in contact with an acid or base
ph for basic solution is more than 7 and less than 14
ph for acidic solution is less than 7 and more than 1
ph for neutral solution is 7
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