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What is the 20^(t h)term of the sequenc...

What is the `20^(t h)`term of the sequence defined by `a_n=(n-1)(2-n)(3+n)?`

Text Solution

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`a_n`=(n-1)(2-n)(3+n)
⇒`a_20`=(20-1)(2-20)(3+20)
⇒`a_20`=(19)(-18)(23)
⇒ `a_20`= -7866.
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