14 marks
Show that is divisible by 9 for all integer values of .
[4]
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Show that is divisible by 9 for all integer values of .
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Prove that for all values of .
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–2 < < 0 and –1 < < 1
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[4]
Always true | Sometimes true | Never true | |
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and are numbers such that
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Always true | Sometimes true | Never true | |
[4]
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